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Still Hoping For Help

1989 9000CD Turbo with B202 Motor & LH 2.4 FI: Problem is low power and mileage. Boost is still good. Suffers from what could be called excessive "Turbo Lag" and very doggy acceleration leaving intersections. I have checked plugs, timing, vacuum leaks, etc., and also verifiied O2 sensor output, and it swung between apprx. .1 volt to .9 volts as the books say it's supossed to. I checked the ELCD for vacuum leaks and it is OK. I have been able to retrieve 2 codes from the ECU. They are 12111 and 12112, both of which point at an incorrect fuel mixture, and that is exactly what it drives like. I have replaced the fuel filter and done a capacity check on the pump and it is fine. Any ideas? Maybe FPR or injectors? How do I check them? Loctite
Reply to
Loctite
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You seem to have covered most things. A few thoughts.

How's the air filter? This can make a big difference.

To test the FPR, put a pressure gauge on the fuel rail.

To test the injectors, you really need to remove them and bench test them individually. However, I have been known to pull the whole rail, point the injectors into a large tray and crank the engine. This gives a good idea about the spray pattern - It'll show up a badly clogged injector - but it isn't recommended practice.

What about the AMM? Have you tested it? Have you tried replacing it?

Good luck.

Reply to
Grunff

Define "good"? Where are you measuring it, and what are you observing?

Have you checked the AMM's base resistance setting? I had one drift after a few hundred thousand miles.

Also - if you hit enter once in a while, your messages will be easier to read and follow up.

Dave Hinz

Reply to
davehinz

Salutations:

Do you have a distributor or a DI?.. It's cross over year..

If you have a distributor on the side of the engine, I would be checking for play in the gear and/or an oil leak in/around the cap or around the plugs in the block.. If it's DI and north american, considered opinion would have it being 'upgraded' (perhaps incorrectly) at some point as they weren't supposed to be selling them here until 1990..

Finally - if may indeed be simply that your injectors are messed up after years of faithful service.. Pull one, put it in a can and then turn the engine over and see how it's putting out fuel - then move on the next one.. Be careful with it, you need to find a pal to start and start the motor for you as you test them and keep a full chemical extinguisher at hand..

Best of luck..

Reply to
Dexter J

Salutations:

Scratch my advise regard>

Reply to
Dexter J

in article bf60up$bif5o$ snipped-for-privacy@ID-152899.news.uni-berlin.de, Grunff at snipped-for-privacy@ixxa.com wrote on 17/07/2003 12:23:

This was one of my thoughts. Mixture doesn't necessarily mean that the fuel system is wrong or over-fuelling (although I don't know what the codes mean); it could be that there's not enough air getting in.

My last 900 had a lumpy feel and after tinkering with the air/fuel mixture screw and the throttle stop for ages managed to solve all the problems with a simple air filter replacement.

Good luck,

Paul

1989 900 Turbo S
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Reply to
Paul Halliday

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