 SOLVED - Question for a D-jetronic FI master / scientist / lover, Can't get it to run smoot, yet! |
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| cvdmolen |
 Jan 18 2014, 10:50 AM
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#1
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Newbie  Group: Members Posts: 23 Joined: 2-April 12 From: Wageningen, NL Member No.: 14,329 Region Association: Europe  |
Ok, here it goes. I bought a 914 1970, EU 1.7 D-jetronic. Off course it didn't run. I did some work on the car & engine -> other topic
But I don't get it to run smoot. I'm not an idiot with these engines, now how they love to have no vacuum leaks, valve adjustment etc etc. I've read a whole lot of bowlsby pages and every other article I could find on the net. But she just doesn't run smooth. What I know for sure: - valves / adjustment / compression -> OK - trigger points and adjustment -> OK - wiring -> OK - injectors checked -> OK - tried different Ecu's -> no difference - tried different MPS -> no difference What doesn't work: She starts, but I've the feeling that she runs on 2.5 cilinders. Lack of power except, sometimes around 2000rpm, she flys Sometimes she runs good, and all of a sudden, crappy. Where to start? Anyone nows these symptoms? And NO I don't want a carb!!!!! |
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| JawjaPorsche |
Jan 18 2014, 10:55 AM
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#2
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Advanced Member Group: Members Posts: 3,463 Joined: 23-July 11 From: Clayton, Georgia Member No.: 13,351 Region Association: South East States |
Fuel filter? Check plug gap. New plugs? Use NGK, mine ran much better with new plugs. NGK BR5ES Part Number. Good luck. (IMG:style_emoticons/default/beerchug.gif)
Don't even think about carbs! (IMG:style_emoticons/default/barf.gif) |
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| cvdmolen |
Jan 18 2014, 11:00 AM
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#3
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Newbie Group: Members Posts: 23 Joined: 2-April 12 From: Wageningen, NL Member No.: 14,329 Region Association: Europe |
QUOTE(JawjaPorsche @ Jan 18 2014, 05:55 PM)  Fuel filter? Check plug gap. New plugs? Use NGK, mine ran much better with new plugs. Good luck. (IMG:style_emoticons/default/beerchug.gif) There are offcourse new plugs in the engine Bosch W8CC, but good tip! I'll also check the new filter! I haven't triple checked both these parts, as they are new and the fuel pressure is adjusted and OK. |
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| mepstein |
Jan 18 2014, 11:17 AM
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#4
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914-6 GT in waiting Group: Members Posts: 19,876 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region 
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check timing
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| Java2570 |
Jan 18 2014, 11:56 AM
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#5
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Senior Member Group: Members Posts: 649 Joined: 7-May 11 From: Fishers, IN Member No.: 13,035 Region Association: Upper MidWest |
When you checked the fuel injectors, did you check them electrically? Did you check their spray patterns? Also, look at the grounds for the injectors....could be the connectors aren't getting good ground due to dirt or looseness. Also, how are the wiring plugs for the injectors themselves? Sometimes they get loose and cause injectors not to fire properly. In addition to the spark plugs, do you have good plug wires and ignition items such as points, condenser, rotor, cap on the dizzy?
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| Cap'n Krusty |
Jan 18 2014, 12:03 PM
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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 |
W8CC is the wrong plug, but I doubt that's your problem. W7CC or B6ES are the 2 correct plugs. There are resistor versions, and they're OK, too. I suspect that "OK" wiring harness isn't OK, and that you may have a bad ground. Jeff Bowlsby does a nice job with harnesses.
You don't say you replaced the injector seals, but you need to ensure they're in good condition. The Cap'n |
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| Bleyseng |
Jan 19 2014, 04:55 AM
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#7
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Aircooled Baby! Group: Members Posts: 13,036 Joined: 27-December 02 From: Seattle, Washington (for now) Member No.: 24 Region Association: Pacific Northwest |
also re-check the spark plug wires that they are in the correct order. Gawd, how many times have I gone over to see a bad running engine to see that!
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| cvdmolen |
Jan 19 2014, 11:31 AM
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#8
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Newbie Group: Members Posts: 23 Joined: 2-April 12 From: Wageningen, NL Member No.: 14,329 Region Association: Europe |
Tnx for all the good tips guys!
Problem solved: the trigger points in the distributor, one side worked, the other didn't, maybe at higher revs sometimes. Time for new ones (IMG:style_emoticons/default/smile.gif) cleaned them, installed the bracket and *&%*(% Yeah -> smooth testdrive. About the spark plugs, I'll order the correct ones! I thought as VW man, that they run on the same as the VW's...... W8CC Grtz from the Netherlands |
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| Cap'n Krusty |
Jan 20 2014, 12:15 PM
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#9
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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 |
Good luck finding new trigger points ................
The Cap'n |
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| bdstone914 |
Jan 20 2014, 03:45 PM
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#10
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bdstone914 Group: Members Posts: 4,906 Joined: 8-November 03 From: Riverside CA Member No.: 1,319 |
I have many good sets of used trigger points. $20 for a set plus shipping.
Bruce |
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| cvdmolen |
Jan 21 2014, 04:01 PM
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#11
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Newbie Group: Members Posts: 23 Joined: 2-April 12 From: Wageningen, NL Member No.: 14,329 Region Association: Europe |
QUOTE(bdstone914 @ Jan 20 2014, 10:45 PM) I have many good sets of used trigger points. $20 for a set plus shipping. Bruce Hi Bruce, Tnx for the offer. I'll check if I've a spare set somewhere. If not, I know how to find you. |
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