Learn from others....never assume it is right, Lessons learned on FI D-jet |
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Learn from others....never assume it is right, Lessons learned on FI D-jet |
914_teener |
Jun 25 2011, 06:39 PM
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#1
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914 Guru Group: Members Posts: 5,197 Joined: 31-August 08 From: So. Cal Member No.: 9,489 Region Association: Southern California |
So after re-habing the whole D-jet system including a beautiful Bowlsby harness and rehabing and checking ALMOST every other FI related part on my car fired it up a couple of weeks ago. Keep in mind I had driven my car for a couple of years with no major problems until my MPS went out.
Well just couldn't get the car to idle right and then it would stall and flood......besides I noticed it seemed to be running rich.......MPS right????? It is brand freaking new! Did I check all the vacum leaks.....Couldn't figure it out...spent hours after work at night in the garage, checking resistance on CHT ect ect......last night after no success I decided F...it I need to start over and check the parts I haven't looked at or tested yet....since the car ran great before....I figured I didn't need to. WRONG...WRONG.....WRONG... NEVER ASSUME that A PO has done something right! Started with the mechanics...compression...spot on 130 each cylinder...hmmmm fuel pressure...didn't have a gauge. Harbor Frieght 29 bucks. Fuel pressure......45 freaking pounds! That was it....idles like puss! Going to get a beer now. Moral of story: Be smart, and listen to and learn from others and don't assume the person before you did it right. Rob |
Tom |
Jun 25 2011, 07:32 PM
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#2
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Advanced Member Group: Members Posts: 2,139 Joined: 21-August 05 From: Port Orchard, WA 98367 Member No.: 4,626 Region Association: None |
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simonr |
Jun 25 2011, 07:58 PM
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#3
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Member Group: Members Posts: 65 Joined: 11-July 10 From: Indianapolis Indiana Member No.: 11,925 Region Association: None |
I got a great quote from Jake Raby" Verify everything" And "Are you SURE" low and behold my timing mark was wrong and I had it set at 54 degrees btdc. My fan had two timing marks .No wonder it was pinging at WOT . I was not SURE. Live and learn Validate and verify EVERYTHING
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skaufmann |
Jun 27 2011, 11:03 PM
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#4
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Blissfully Ignorant Group: Members Posts: 103 Joined: 26-May 11 From: San Diego - College Area Member No.: 13,123 Region Association: Southern California |
More fuel pressure = more power no?!?
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SLITS |
Jun 28 2011, 07:00 AM
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#5
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"This Utah shit is HARSH!" Group: Benefactors Posts: 13,602 Joined: 22-February 04 From: SoCal Mountains ... Member No.: 1,696 Region Association: None |
Somewhere above, say 35 lbs, the injector stays open (leaks) and causes a very rich mixture. Fuel pressure overrides the solenoid & spring's ability to shut off the fuel.
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Cap'n Krusty |
Jun 28 2011, 07:59 AM
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#6
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Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
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sean_v8_914 |
Jun 28 2011, 08:40 AM
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#7
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Chingon 601 Group: Members Posts: 4,011 Joined: 1-February 05 From: San Diego Member No.: 3,541 |
nice work!
brad (paul) Anders has a check list on his d jet site. it is easier and FASTER to just go down teh list, check everything rather than trouble shooting. then I go over the hose diagram. I do mechanical, hoses then brads list and for teh record: correct D jet fuel PSI is...? |
Cap'n Krusty |
Jun 28 2011, 09:48 AM
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#8
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Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
2 Bar, 29.4-30 PSI.
The Cap'n |
RFoulds |
Jun 28 2011, 01:01 PM
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#9
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Green Teen 66 Group: Members Posts: 837 Joined: 10-August 09 From: La Quinta, CA Member No.: 10,656 Region Association: Southwest Region |
How did you correct the pressure? Was it a bad pressure regulator??
(IMG:style_emoticons/default/huh.gif) |
Jake Raby |
Jun 28 2011, 03:30 PM
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#10
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Engine Surgeon Group: Members Posts: 9,394 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
ASSUME that nothing is correct and quantify everything.
The first and biggest rule in mechanical manipulation. If you didn't do it yourself, it didn't happen. |
aircooledtechguy |
Jun 28 2011, 04:12 PM
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#11
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The Aircooledtech Guy Group: Members Posts: 1,966 Joined: 8-November 08 From: Anacortes, WA Member No.: 9,730 Region Association: Pacific Northwest |
ASSUME that nothing is correct and quantify everything. The first and biggest rule in mechanical manipulation. If you didn't do it yourself, it didn't happen. I'll second that one!! Clients bring stuff in all the time swearing that they checked the basics. . . (IMG:style_emoticons/default/rolleyes.gif) From my experience, it's usually the basics!! |
Kraftwerk |
Jun 29 2011, 08:35 AM
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#12
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Member Group: Members Posts: 195 Joined: 6-September 07 From: Bbbbbrroooklynnn Member No.: 8,085 |
What did you do to lower the fuel pressure?
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914_teener |
Jun 29 2011, 08:43 AM
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#13
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914 Guru Group: Members Posts: 5,197 Joined: 31-August 08 From: So. Cal Member No.: 9,489 Region Association: Southern California |
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Ductech |
Jun 30 2011, 05:11 PM
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#14
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Member Group: Members Posts: 356 Joined: 16-July 10 From: AridZona Member No.: 11,949 Region Association: Southwest Region |
ASSUME that nothing is correct and quantify everything. The first and biggest rule in mechanical manipulation. If you didn't do it yourself, it didn't happen. This applies everywhere..... can't tell you how many customers would have there bike towed cause they forgot they flipped the kill switch.....put the key in and it didn't start.... got start from the bottom then go up from there. |
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