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Posted by: cvdmolen Jan 18 2014, 10:50 AM

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 -> http://www.914world.com/bbs2/index.php?showtopic=181698&hl=
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!!!!!

Posted by: JawjaPorsche Jan 18 2014, 10:55 AM

Fuel filter? Check plug gap. New plugs? Use NGK, mine ran much better with new plugs. NGK BR5ES Part Number. Good luck.

Don't even think about carbs!

Posted by: cvdmolen Jan 18 2014, 11:00 AM

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.

Posted by: mepstein Jan 18 2014, 11:17 AM

check timing

Posted by: Java2570 Jan 18 2014, 11:56 AM

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?

Posted by: Cap'n Krusty Jan 18 2014, 12:03 PM

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

Posted by: Bleyseng Jan 19 2014, 04:55 AM

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!

Posted by: cvdmolen Jan 19 2014, 11:31 AM

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 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

Posted by: Cap'n Krusty Jan 20 2014, 12:15 PM

Good luck finding new trigger points ................

The Cap'n

Posted by: bdstone914 Jan 20 2014, 03:45 PM

I have many good sets of used trigger points. $20 for a set plus shipping.

Bruce

Posted by: cvdmolen Jan 21 2014, 04:01 PM

Hi Bruce,
Tnx for the offer. I'll check if I've a spare set somewhere. If not, I know how to find you.