'87 2.9 intermittant idle issues
Just picked up an '87 extended cab with the 2.9l auto. Seems to be in pretty good shape for it's age except for the fact that is has an idle issue that comes and goes every minute or so. Runs fine for a minute, then stumbles for about 30 seconds, then will run fine again for a while. PO said he put a gauge on fuel system that read 34 until idle would stumble, then would increase to 40. So he ordered a fuel pressure regulator which I installed last night. Didn't help. Will probably check the basics this weekend (i.e. air-idle bypass, throttle body, fuel filter, etc.) If you guys have any suggestions or have had a similar problem, would be greatly appreciated. Will also look for code reader this weekend, any suggestions on that would also be appreciated.