MPS, Rebuilding the MPS Options

[rjames]

Put the ecu knob back in the middle and adjust only the inner screw counter clockwise until it idles ok. Then turn the screw slowly clockwise to lean it out a bit again until the idle starts hunting and then go back a 1/4 turn at most so it stops hunting. That should put you in the ballpark and allow you to drive the car, assuming everything else is good. Then use the wideband o2 readings to dial it in further.

[Ron914]

Put the ecu knob back in the middle and adjust only the inner screw counter clockwise until it idles ok. Then turn the screw slowly clockwise to lean it out a bit again until the idle starts hunting and then go back a 1/4 turn at most so it stops hunting. That should put you in the ballpark and allow you to drive the car, assuming everything else is good. Then use the wideband o2 readings to dial it in further.

Thanks for the reply . I need to add that I must set my timing still , should I try this considering my timing is not spot on . It's kind of hard to set timing with the car running so rough right now .

[JeffBowlsby]

Of those three pairs of wires, one is grounds for the ECU and TPS, and if this one was disconnected, car would not run at all. The other two pairs are for the 2 injector banks. You were probably only running on 2 cyl.

[Ron914]

Of those three pairs of wires, 1 iz grounds did the ECU and TPS. Octet one was disconnected, car would not run at all. The other two pairs are for the 2 injector banks. You were probably only running on 2 cyl.

Makes sense.

[rjames]

Put the ecu knob back in the middle and adjust only the inner screw counter clockwise until it idles ok. Then turn the screw slowly clockwise to lean it out a bit again until the idle starts hunting and then go back a 1/4 turn at most so it stops hunting. That should put you in the ballpark and allow you to drive the car, assuming everything else is good. Then use the wideband o2 readings to dial it in further.

Thanks for the reply . I need to add that I must set my timing still , should I try this considering my timing is not spot on . It's kind of hard to set timing with the car running so rough right now .

Get all of your injectors working first. If after that the car is running rough after setting the timing, try the above. Note any changes you make so they can be reversed if need be. BTW, I know meters readings can vary, but your MPS curve looks a lot more lean than it should be, especially as you approach WOT.

[Superhawk996]

Those grounds are mighty crispy and corroded and are not going to do you any favors in the long run. (IMG:style_emoticons/default/poke.gif) what’s the rest of your FI look like - hopefully not as cracked.

Clean the grounds with small wire brush until shiny. Stay focused on getting running and/or verifying injectors as noted above.

Plan for new FI wiring harness in the future.

[Superhawk996]

I need to add that I must set my timing still , should I try this considering my timing is not spot on . It's kind of hard to set timing with the car running so rough right now .

(IMG:style_emoticons/default/bs.gif)

Set static timing at 7-8 degrees using a multimeter or test lamp. That will always get you close enough to start and run decently without the need to get RPMs up to set & verify full advance. Of course this assumes your dizzy advance isn’t siezed up or non-functional.

Lots of videos of how to set static timing on VW’s on the YouTubez.

If you need help or don’t understand the process after watching a couple videos - we’re here to help (IMG:style_emoticons/default/grouphug.gif)

[Ron914]

I need to add that I must set my timing still , should I try this considering my timing is not spot on . It's kind of hard to set timing with the car running so rough right now .

(IMG:style_emoticons/default/bs.gif)

Set static timing at 7-8 degrees using a multimeter or test lamp. That will always get you close enough to start and run decently without the need to get RPMs up to set & verify full advance. Of course this assumes your dizzy advance isn’t siezed up or non-functional.

Lots of videos of how to set static timing on VW’s on the YouTubez.

If you need help or don’t understand the process after watching a couple videos - we’re here to help (IMG:style_emoticons/default/grouphug.gif)

Thanks for checking in on me @Superhawk996 ,
I have been taking a break as I let a lot things go working on my car and need to get caught up . I have more time this weekend and next week to give it one more shot at getting it running so I can drive it to the WCR in a few weeks . I made up a remote start switch to help me ,I have a good timing mark on my flywheel that I can see now for timing . I still have the Pertronix in the dizzy but am thinking of going back to the points/condenser again just to eliminate any possibility the Pertronix is a part of the problem .I saw the break in one of the ground wires and have purchased some new connectors and a brass wire brush to clean up my connections . I actually would like to see if anyone locally has a good MPS just to eliminate if my new problems are coming from it . At the WCR I believe Jeff B is giving away a couple of gift certificates for a raffle so maybe I'll get lucky and win one . I can use it to offset the cost of a new wiring harness if I don't find my problems . Based on the flywheel timing mark I added a white dot on my fan wheel to help . I believe my advance on the dizzy is ok ,I connected the mighty vac and can see the advance plate moving inside my dizzy . I will add an update after the weekend.

[Superhawk996]

My bad Ron

I completely forgot you were running Pertronix.