BIG PROBLEMS w/ 1990 - 4.9 straight six
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BIG PROBLEMS w/ 1990 - 4.9 straight six
Hi All,
I have a 1990 - 4.0 - straight six w/160 K miles.
I jumped it off another truck and it started but the cd player made noise and the starter made a growling noise. And if you are wondering, I DIDN'T cross the negative to positive and the positive to the negative by mistake. Wouldn't start, My mechanic replaced cracked distributor cap and module. Still runs badly for about 3 minutes then shuts off. He has checked EGR system, and thought it might be the PCM so he switched it out with another truck of similar year. Didn't make a difference. He said he checked all the sensors. He said the system is drawing in way to much fuel. What would make it do that? He will take any possible suggestions.
I have a 1990 - 4.0 - straight six w/160 K miles.
I jumped it off another truck and it started but the cd player made noise and the starter made a growling noise. And if you are wondering, I DIDN'T cross the negative to positive and the positive to the negative by mistake. Wouldn't start, My mechanic replaced cracked distributor cap and module. Still runs badly for about 3 minutes then shuts off. He has checked EGR system, and thought it might be the PCM so he switched it out with another truck of similar year. Didn't make a difference. He said he checked all the sensors. He said the system is drawing in way to much fuel. What would make it do that? He will take any possible suggestions.
Last edited by carolynyates77; Oct 3, 2012 at 12:05 PM.
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Joined: May 1999
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From: Copley, Ohio
Is it throwing any codes?
It sounds like the IAC actuator and/or the ECT sensor are not functioning properly but that is only a very rough guess. Pull the diagnostic codes before you change anything else.
It sounds like the IAC actuator and/or the ECT sensor are not functioning properly but that is only a very rough guess. Pull the diagnostic codes before you change anything else.
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Hi StrangeRange,
Thanks for viewing my problem. I will send it to my mechanic. He said the computer does not thro out codes to read. It is a 1990. Is this because he doesn't have the right scanner? Someone else said it might require a scanner that reads an OBO1 computer?
Thanks for viewing my problem. I will send it to my mechanic. He said the computer does not thro out codes to read. It is a 1990. Is this because he doesn't have the right scanner? Someone else said it might require a scanner that reads an OBO1 computer?
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Joined: May 1999
Posts: 2,477
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From: Copley, Ohio
An OBD-II scanner will not work on an OBD-I vehicle like yours. But you don't need a scanner to pull OBD-I codes. you can do it with a paper clip. If you search this forum you will find instructions.
