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> What the F is wrong with my car?, I just want to roll it off a clif.
Eric Taylor
post Feb 23 2004, 08:29 PM
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So today I got the new trigger contact's installed and put the distro carefully back in, so I hopefully did not adjust the timing to far. Go to hit the key and it turns over just like a champ, hit the gas, it's a little hesatent, but run's alright, I know the plugs are black so I go to pull and clean them, thinking the car will run great with a clean set of plugs. Well I just put them back in and hit the key. The car ran crappier than ever, still spitting fluid out the exaust, still hesatating under power, like it's running super rich, which is my main problem with this piece of crap. So basicaly i'm pissed. So far I have not had a chance to drive the thing much over a mile yet since buying it in June of 03, and have replaced the following:
Entire clutch assembly
Points
Cap
Rotor
Plugs
Plug Wires
FI Wireing harness
MPS
CHT
FI Trigger Contact's
Set and rest the fuel pressure

I'm at a total loss for what could be wrong. So here are my symptoms. The care bog's down under power, and is totally undrivable except for in and out of the garage. The plugs are Black when you pull them and there is fluid coming out the tail pipe. The only thing's I can think of are injectors, or that this engine has been screwed with so that a 1.7 injection system just plain won't work with it. I know it has been re-built in the past, but I have no idea weather it was top/bottom end or the spec's. Sorry for the long post, but I just plain don't know what to do. Help!
Thanks,
Eric
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ArtechnikA
post Feb 24 2004, 12:21 PM
Post #22


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wish i could be more help, i'm pretty clueless with EFI.
but it appears you have replaced just about everything, leaving you with only two possibilities:

1) it's something else
2) something you thought you replaced with a "known good" isn't.

only a few things will make the car run THAT rich.
bad temp sensors is one - measure the resistance *at the ECU connector pins* to verify that the complete end-to-end signal path is correct.

bad MPS is another - these aren't as easy to test at the ECU connector but you ahoul carefully Ohm the circuits. unfortunately, there are no easy workarounds for what the MPS does that you can plug in 'just to test.'

very, very bad Cold Start Valve is a remote possibility. atr this point, either physically remove it from the manifold and check by looking to verify that it never sprays, or remove and plug the feed line (or both...)

i've seen worn, crappy trigger points do this, but good new ones tend to be good.

ECU failures are rare but they do occur. in fact, IIRC, one of the few failure modes is that all the injectors turn on, all the time.
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Eric Taylor   What the F is wrong with my car?   Feb 23 2004, 08:29 PM
steve@ottosvenice.com   Give me a call we will get it running. Just relax ...   Feb 23 2004, 09:01 PM
Eric Taylor   Sounds like a plan steve. Talk to you tomorrow. Er...   Feb 23 2004, 09:06 PM
r_towle   I have been there. Check for a vacuum leak at the ...   Feb 23 2004, 09:10 PM
Eric Taylor   humm, could be a good place to start. I've got...   Feb 23 2004, 09:35 PM
jkeyzer   It's really a shame but I think a lot of 914 o...   Feb 23 2004, 09:37 PM
Bleyseng   What kind of vacuum is the engine pulling at idle?...   Feb 23 2004, 09:55 PM
Rick_Eberle   I had a similar problem a few years ago, though mi...   Feb 23 2004, 11:14 PM
Bleyseng   Yeah, that does happen but the ECUs rarely go bad ...   Feb 23 2004, 11:49 PM
Eric Taylor   Sounds like a good idea. Anyone have a good 72 1.7...   Feb 24 2004, 12:54 AM
nebreitling   eric, sorry to hear about this. your pain is palp...   Feb 24 2004, 01:06 AM
keith   Hey, I'll drive my shitty running car halfway ...   Feb 24 2004, 02:48 AM
mike_the_man   Another thing to check could be the cold start inj...   Feb 24 2004, 09:48 AM
Eric Taylor   Thanks everyone. It's good to know I'm not...   Feb 24 2004, 10:18 AM
Bleyseng   Unplug the CVS when starting it up to see if that...   Feb 24 2004, 10:32 AM
ArtechnikA   wish i could be more help, i'm pretty clueless...   Feb 24 2004, 12:21 PM
Jeffs9146  
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  Feb 24 2004, 12:28 PM
ArtechnikA  
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  Feb 24 2004, 01:26 PM
RocknRollFrenzy  

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