Question:
This has been an ongoing problem. It is sporatic with no pattern or reccognizable common factor and has been present before and after replacing the following: main computer (twice), ignition module (4 times), distributor cap/rotor (twice), the distributor itself, plugs/wires (twice), engine block (it had 205k miles), all sensors (each one) including the idle position sensor (twice), egr valve (twice), egr valve relay, fuel pressure regulator (twice), has good fuel pressure at the rail (yes, drove around with a guage attached), vacuum is good, no computer codes show up (ever), happens while using rear or midship fuel tank and when either is full, half or near empty. Every time I take it to "someone who knows" they immediately want to hook it up to a computer... this does not work-nothing ever shows. I need someone who truely understands a 1987 injected 302 inside and out. I am not selling the truck. Most of the time it runs like a brand new truck... new motor has less than 35k miles.
Answers:
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On the throttle body, there is an idle air control valve. This is operated by the engine computer to maintain the correct idle speed.schematics of a 89 Dodge Ram 150?
Sometimes these valves get dirty and stick. Remove the valve and clean the valve and port with carburetor cleaner.
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If this doesn't work, check the wiring to the valve or replace the valve.
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fords IAC valves are a known problem also known to plug EGR systems sounds like a de-carboning of upper cylinder system needs to be done.Can I disconnect load leveler circuit 1999 Marquis?
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I own the same exact vehicle and recently had the same problem. My solution to it turned out to be the vacuum assist for the brakes was somehow defective and when i went to slow down sometimes it would try to stall, even with the tranny in neutral. I studied this for some time and even took it to a few "techs", no one knew why or could find anything wrong with it. I stripped it all down to the fire wall and replaced everything, and I haven't had a problem since.can you fit aclutch from a toyota 2.5 to a 2.7 hilux?
check for water in your tanks,and check for vapour lock in fuel lines and check your fuel filtersMore Questions & Answers ...
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