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Re: Hesitation during accelerating Posted by JimBlake [Email] ![]() ![]() ![]() In Reply to: Re: Hesitation during accelerating, WJ, Thu, 11 Jul 2002 03:44:19 Members do not see ads below this line. - Help Keep This Site Online - Signup |
The codes you gave...
12231 - no ignition signal - this just means you read the codes without the engine running.
12111 & 12112 - lambda running & at idle - are probably a result of the last code...
12241 - bad injector.
The ECU can cycle the injectors, you listen for one which doesn't work, & replace it. It's almost like reading the codes...
For these tests, you ground the jumper BEFORE turning on the ignition. DON'T start the engine. When the check engine light (CEL) flashes once, open the jumper and listen for the fuel pump to run for about 1 second.
Ground the jumper till the CEL flashes once, then open it for the next test. After you're done with each test, ground the jumper till the CEL flashes once, just like you're trying to read the next fault code.
Each test, in this order, displays a code like the faults:
1) (no code) fuel pump - listen, it'll run for about 1 second
2) 12411 fuel injectors - listen (unplug individually if you want)
3) 12412 AIC valve - listen, it'll open/close once per second
4) 12413 ELCD valve - listen, it'll cycle once per second
5) 12421 "drive" signal, automatic - stops flashing when you shift D to N
6) 12424 throttle closed signal - stops flashing when you just open throttle
7) 12431 throttle open signal - stops flashing when you fully open throttle
If you find an injector that doesn't click, you can swap it to see if its the injector or the wiring. But first, get new o-rings for the injectors (2 each) because they will be hard & brittle.
posted by 131.184.14...
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