Cal3thousand Posted March 13, 2008 Report Share Posted March 13, 2008 So I've been getting a consistent P0103 code. Some other codes here or there including P0172 (rich) and a IAC trim too far out of spec code once.with the scanner hooked to the car to read live parameters, at idle, MAF read 208.39 gm/s and absolute throttle position at 11.4%. Car would idle to 10 seconds and die.REPLACED MAF.Now MAF reads ~60 gm/s, still too high and the car won't even start. I jumped the fuel pump relay, nothing different, except I can hear the pump running with key on engine off. IAC buzzes for a short time after as well.So my conclusion thus far are: 1) original MAF was busted2) even with new MAF, some other sensor is fuxed or the wiring to ECU or ECU itself is busted.Replaced: cap, rotor, MAF, new ground wires from block to chassis (only the two attached to the exhaust side thus far), fuel pump relay capacitorsCleaned: IACx3, MAF connector.waiting on: wire set, plugs (but they were replace not too long ago). from FCPChecked: hoses look like they are on solid, fuel pump relay, vacuum lines (except one that runs under the intake manifold [just saw this on another thread]), MAF connector (the connections look solid, did voltage/resistance checks per service manual [ i might be doin something wrong tho])NEED: ECU to swap test, already asked a couple of folks here for prices. EDIT also need to test fuel pressure at railHELP! i need ideas and thoughts Link to comment Share on other sites More sharing options...
7 VII 7 Posted March 13, 2008 Report Share Posted March 13, 2008 sorry, you checked the vacuum line that runs INTO the intake manifold under the t-stat? Link to comment Share on other sites More sharing options...
Gilhuly Posted March 13, 2008 Report Share Posted March 13, 2008 Pull the plugs and let it dry out for a while. Make sure you have spark Link to comment Share on other sites More sharing options...
Cal3thousand Posted March 13, 2008 Author Report Share Posted March 13, 2008 sorry, you checked the vacuum line that runs INTO the intake manifold under the t-stat?No, not yet, I just discovered, on another thread (yours? cant remember) , that this one exists. Will do tonight after workPull the plugs and let it dry out for a while. Make sure you have sparkDo I need to pull them for them to dry? won't the fuel evaporate overnight? Link to comment Share on other sites More sharing options...
Cal3thousand Posted March 13, 2008 Author Report Share Posted March 13, 2008 Another thought,I might be getting ahead of myself, but if another ECU shows the same issues and it is diagnosed as a wiring issue,What is involved with replacing the MAF portion of the wiring harness, if possible or the whole engine harness? Link to comment Share on other sites More sharing options...
Gilhuly Posted March 14, 2008 Report Share Posted March 14, 2008 I'd pull them to eliminate the unknown. I suppose you could disconnect the electricals to the fuel pump and crank it over for a lttle bit to clear any excess fuel out of there. If you pull the plugs you can verify spark and clear the combustion chamber. If you have spark, you're either getting no fuel or you have way too much (P103 suggests way too much). In any event, looking at the plug and into the combustion chamber will tell you some fundamental information. These cars are very rich at start up. Adding that to an already soaking wet combution chamber could keep you from starting.No, not yet, I just discovered, on another thread (yours? cant remember) , that this one exists. Will do tonight after workDo I need to pull them for them to dry? won't the fuel evaporate overnight? Link to comment Share on other sites More sharing options...
7 VII 7 Posted March 14, 2008 Report Share Posted March 14, 2008 how did that vacuum line look? Link to comment Share on other sites More sharing options...
Cal3thousand Posted March 14, 2008 Author Report Share Posted March 14, 2008 how did that vacuum line look?Didn't get the time to look, but I found my main problem. It's detail in my other thread:Long story short, I have a 1994 but since it was made late 1994, I should've used the 1995-1997 MAF I am going to check that vac line this weekend though. Thanks for the help Link to comment Share on other sites More sharing options...
MrWinkey Posted March 14, 2008 Report Share Posted March 14, 2008 That vacuum line is more than likely your fault code Link to comment Share on other sites More sharing options...
Cal3thousand Posted March 14, 2008 Author Report Share Posted March 14, 2008 That vacuum line is more than likely your fault codeDefinitely checking that tomorrow and will report back ... with the CORRECT MAF installed :lol: Link to comment Share on other sites More sharing options...
Cal3thousand Posted March 16, 2008 Author Report Share Posted March 16, 2008 Final Update...She's running well and it's all good.Edit: vacuum line looked fine. Link to comment Share on other sites More sharing options...
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