 Zach's Carbs to Microsquirt conversion thread, 7/20/18 update |
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| VaccaRabite |
 Oct 11 2011, 06:44 PM
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#1
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En Garde!  Group: Admin Posts: 13,756 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region 
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I am retrofitting this thread to be my full on conversion thread, documenting my change from dual 40 Webers to MSII fuel injection.
Here is what I have so far, and what I need: HAVE:
Built on 1.7 heads. Jake's 9530 cam (carb cam similar to Web 494) Mallory optical ignition ACCEL (UltraCoil) coil. SSI exchangers for exhaust. My goals for this project are to have near stock intake noise volume, better cold starting - especially in cooler weather, negate the bad effects or Ethanol on carbs, teach myself something about fuel injection. Since I already have a pretty good ignition system, I am not going to go after crank fired ignition at this time, but I am not ruling that out for the future. Before I begin the conversion, I am going to pull the engine and do a little refreshing and cleaning, including:
QUOTE I am getting ready to start my conversion form carbs to EFI. My goal is to use as much stock EQ as I can, but replace the sensors and such with modern, easy and cheaper to find stuff. Plus, since my car has a cam, the stock FI will not work. My engine has 1.7 4 bolt heads. 1) are the 1.7 and 1.8 intake runners the same? 2) Is the intake runner inside diameter smaller then the 2.0 intake runner ID? 3) is the throttle body for the 1.8 smaller then the throttle body for the 2.0? If the 1.8 TB is smaller then the 2.0, can the 2.0 TB be swapped in? Are 1.8 injectors high or low impedance? I am asking this as I will be able to get Joe's discarded 1.8 bits when he pulls his engine and starts going down the 2056 route. Zach |
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Replies(400 - 419)
| VaccaRabite |
May 25 2015, 06:12 PM
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#401
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En Garde! Group: Admin Posts: 13,756 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region
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Its a possibility. Mark does not think so, but it is a possibility.
Also a strong possibility that I don't have the software set up properly. The shield wire grounds to the engine case. I am wondering if it has an improper ground. I'm going to pull the doghouse at some point this week (if I can get time) which will also let me pull the wire and sensor. Then I can test it on the bench. Zach |
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| toon1 |
May 25 2015, 06:16 PM
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#402
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Senior Member Group: Members Posts: 1,849 Joined: 29-October 05 From: tracy,ca Member No.: 5,022 |
At this point I'd start looking at taking everything, put it on a bench top, hook the TWo a drill, hook the rest to a stim board and diagnose.
It must be a PITA to try and trouble shoot everything bent over the engine bay. |
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| VaccaRabite |
May 25 2015, 06:38 PM
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#403
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En Garde! Group: Admin Posts: 13,756 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region
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At this point the tach is the only sensor malfunctioning. Everything else seems to be working fine and responding to input.
Zach |
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| McMark |
May 25 2015, 06:41 PM
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#404
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914 Freak! Group: Retired Admin Posts: 20,180 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
I'm just gonna be an asshole until it happens -- use the tooth analyzer tool.
(IMG:style_emoticons/default/biggrin.gif) |
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| VaccaRabite |
May 25 2015, 08:04 PM
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#405
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En Garde! Group: Admin Posts: 13,756 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region
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I will. Sometime this week I will get that loaded. Was hoping to today but kid B and I both get t stomach bugs today. :-(
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| Dtjaden |
May 25 2015, 09:44 PM
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#406
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Member Group: Members Posts: 232 Joined: 25-May 13 From: Morgan Hill, CA Member No.: 15,915 Region Association: Northern California |
Zach,
I may have lead you astray with my comment about wrong sensor type. I have an MS3ex so VR vs Hall requires jumpers on the main board. I believe you are using a Microsquirt which requires different wiring connections to the ecu and no internal changes. The appropriate manual for Microsquirt discusses checking out the crankshaft sensor in section 2.15 on page 38. This is a link to the manual: http://www.msextra.com/doc/pdf/Megasquirt2...ting_Up-3.3.pdf I tested the sensor location using the Composite Logger and Tooth Logger as discussed in the manual just using the starter to turnover the engine. I had to adjust the sensor location location closer to the tooth wheel than I initially had set it to get a crank signal. Darryl |
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| crash914 |
May 27 2015, 05:59 PM
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#407
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its a mystery to me Group: Members Posts: 1,830 Joined: 17-March 03 From: Marriottsville, MD Member No.: 434 Region Association: MidAtlantic Region |
Let me know, but I seem 2 be available this weekend if I can help. If not, I will put mine back together...
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| VaccaRabite |
May 27 2015, 08:55 PM
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#408
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En Garde! Group: Admin Posts: 13,756 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region
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I'm helping family move Saturday but will be free Sunday.
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| crash914 |
May 28 2015, 02:53 AM
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#409
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its a mystery to me Group: Members Posts: 1,830 Joined: 17-March 03 From: Marriottsville, MD Member No.: 434 Region Association: MidAtlantic Region |
I should be able to do Sunday, anytime after 12:00..
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| VaccaRabite |
May 28 2015, 07:33 PM
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#410
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En Garde! Group: Admin Posts: 13,756 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region
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QUOTE(crash914 @ May 28 2015, 04:53 AM)  I should be able to do Sunday, anytime after 12:00.. Awesome. Bring your oscilloscope. If we do nothing but get the tach readout working I'll call that a win for the day! Course, if we get the tach signal working, it will probably fire up. Zach |
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| VaccaRabite |
May 30 2015, 07:20 AM
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#411
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En Garde! Group: Admin Posts: 13,756 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region
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Last night I got the BG 3.83 code loaded. Yay!
I also tried to load the tooth analizer, but the firmware uploader did not like it. Need to see if there is a different uplader for that code. However, once the BG 3.83 code was loaded, the ECU started constantly tripping the fuel pump solenoid. Nonstop. As soon as it finished one pulse, the solinoid would trip for another. At this point I was too tired to continue (was not able to start work until 10PM last night) so I just unplugged everything and came in. I'm going to reload the MSextra 3.3.3 code and run with that. I may also try the MS uploader to see if I can get the tooth analyzer to work - but this will be obviated if Herb brings his oscilloscope tomorrow. Zach |
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| crash914 |
May 30 2015, 07:32 AM
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#412
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its a mystery to me Group: Members Posts: 1,830 Joined: 17-March 03 From: Marriottsville, MD Member No.: 434 Region Association: MidAtlantic Region |
Planning on it!
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| McMark |
May 30 2015, 09:29 AM
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#413
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914 Freak! Group: Retired Admin Posts: 20,180 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
The pulsing fuel pump will go away once you choose the ecu type in the general settings. Which is to say, it's normal.
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| VaccaRabite |
May 31 2015, 06:16 PM
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#414
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En Garde! Group: Admin Posts: 13,756 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region
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Stuff got done today.
We did not fire, but we got closer! Herb and his son came over. We got the B&G 3.830a code loaded on the ECU We used Herb's oscilloscope to confirm that we were getting a solid VR signal from the crank wheel. We wiped out the B&G code and loaded the tooth analyzer to confirm that the ECU was recognizing the signal from the VR. Put back on the B&G code and got stuck. So we called Mark out in California who walked us through the settings needed to have the ECU start using the tach signal. We got the VR signal reading the 170ish RPM from cranking, and even got an occasional spark (as registered from the timing light). But the engine would not fire. Aside from getting the right fuel and the right spark at the right time, logs showed that the ECU was getting shitty power. We think this was due to an early iteration of the fuse block on the harness. Mark has since moved to a more robust block, and I bought one to replace the fuse block currently on the harness.  Output from the tooth analyzer. The missing tooth was inverted here, so we had to change the setup in Tuner Studio. Zach |
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| 904svo |
May 31 2015, 07:56 PM
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#415
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904SVO Group: Members Posts: 1,126 Joined: 17-November 05 From: Woodstock,Georgia Member No.: 5,146 |
QUOTE(Vacca Rabite @ May 31 2015, 04:16 PM) Stuff got done today. We did not fire, but we got closer! Herb and his son came over. We got the B&G 3.830a code loaded on the ECU We used Herb's oscilloscope to confirm that we were getting a solid VR signal from the crank wheel. We wiped out the B&G code and loaded the tooth analyzer to confirm that the ECU was recognizing the signal from the VR. Put back on the B&G code and got stuck. So we called Mark out in California who walked us through the settings needed to have the ECU start using the tach signal. We got the VR signal reading the 170ish RPM from cranking, and even got an occasional spark (as registered from the timing light). But the engine would not fire. Aside from getting the right fuel and the right spark at the right time, logs showed that the ECU was getting shitty power. We think this was due to an early iteration of the fuse block on the harness. Mark has since moved to a more robust block, and I bought one to replace the fuse block currently on the harness. Output from the tooth analyzer. The missing tooth was inverted here, so we had to change the setup in Tuner Studio. Zach Check the voltage on the coil, I had a problem when cranking the voltage would drop low enought to stop the engine from firing. My fix was to wire the coil through a relay to the battery post. |
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| 914itis |
May 31 2015, 08:42 PM
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#416
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Advanced Member Group: Members Posts: 2,892 Joined: 9-October 10 From: New York City Member No.: 12,256 Region Association: North East States |
I've been watching this thread from day one. Every email notification I jump with anxiety.
This car is cursed. |
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| VaccaRabite |
May 31 2015, 09:17 PM
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#417
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En Garde! Group: Admin Posts: 13,756 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region
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Its getting closer. I've put all other hobbies aside this summer to work this out. Made my wood shop off limits. I've not been shooting (much) or building firearms at all.
For the past many years, I've ignored the car for projects with faster turn around. Now I'm trying to keep myself as laser focused on it as I am able. When I get reliable spark (which is the battle I'm fighting now), I'll be able to set timing fairly easily. That will also get me to a point where it should start and idle. The only rapid turnaround projects I have been doing are little things for the 914. Like installing the BMW mirror. And today I took off a door panel to fix whatever was wrong with the window regulator. I've also really dialed in the shifter. Other small stuff like new carpet, LED tails and front turn signals, and rebuilding the front headlight mechanisms are on the work list too, but these are all "I'm frustrated lets do something easy" jobs. The car has been problematic. But I'm learning everything as I do it. Bound to run into errors along the way. Zach |
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| Dr Evil |
Jun 6 2015, 06:42 AM
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#418
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Send me your transmission! Group: Members Posts: 23,041 Joined: 21-November 03 From: Loveland, OH 45140 Member No.: 1,372 Region Association: MidAtlantic Region
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I look forward to this running.....and the subsequent "I got towed home again" posts as you work through all the bugs (IMG:style_emoticons/default/smile.gif)
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| mepstein |
Jun 6 2015, 07:41 AM
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#419
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914-6 GT in waiting Group: Members Posts: 19,958 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region
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QUOTE(914itis @ May 31 2015, 10:42 PM) I've been watching this thread from day one. Every email notification I jump with anxiety. This car is cursed. No, just challenged. |
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| 76-914 |
Jun 6 2015, 08:07 AM
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#420
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Repeat Offender & Resident Subaru Antagonist Group: Members Posts: 13,736 Joined: 23-January 09 From: Temecula, CA Member No.: 9,964 Region Association: Southern California
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Not trying to be mean spirited Zach. Just wanted to know when was the last time this car was on the road?
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