When vehicle came in i was able to communicate with mod.is now i cant.it will start up run rich for a few minutes and shut off. checked power at com.puter and grounds.checked harness for bad wires tried. acdelco computer. still nothing
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
I would check out the VSS - vehicle speed sensor for being shorted internally. This sensor get's a five volt ref. from the PCM or TCM which ever your vehicle has . Disconnect the VSS sensor connector an see if the vehicle starts . If the sensor is shorted it will bring down the data communication bus causing a no crank , no start on some make vehicles ! When you turn the key to the run position does the check engine light come on an then go off after a few seconds ?
i would take it to a nearby parts store and ask to use the OBDII -code reader it plugs into the drivers side under the dash ...once connected turn the key to the on position and when is says communicating with vehicle let it continue on after a few minutes it will give you codes as well as a readout of issues that it has found ...any parts you may need will be there and you will have an option to clear all codes after the fix ..but it could be a few things going on such as a failing fuel-pump cracked plugs /wires or a wire that is grounding out on the block because the wires run close to the motor area ...hope this helps you
Hi there,first of all you must synch the cam/crank sensors. To do this put the engine on top dead center remove the distributor cap and look very closely at the dist housing there will be a 6 mark and an 8 mark loosen distributor and rotate untill the rotor points directly at the 8. The marks are small so get a light and look closely.Clear codes and restart. Is vehicle still running rich?
If the engine is trying to flood, it will kill the engine. If you have the spider fuel system, it is noted for problems.
If it cranks good but won't start, have a helper crank it while you check for spark at the spark plugs. If spark everywhere, use a gage and check proper fuel pressure, also, check fuel injector pulse.
I don't know if this may be a problem? below
I went through this scenario while working in a toyota sienna a few months ago and it ended up being the battery. When battery supply voltage starts to drop the PCM will limit voltage to certain areas.
Check your fuel pressure regulator. Make sure you have a good vacuum to it and it is not leaking. 48 psi is a bit much and once it warms up will cause the vehicle to stumble and stall. Code 12 is a normal system.
Hope this helps.