Mechanics

ROUGH IDLE AND HARD START WHEN WARM

1988 Toyota Pickup

Engine problem
1988 Toyota Pickup 6 cyl Four Wheel Drive Manual 258000 miles

Motor was replaced last year. Truck idles rough and misses at steady throttle after it has warmed up if I can get it started. Starts and runs fine when cold (closed loop). I been watching fuel pressure during these episodes seems to maintain around 46 p.S.I, although I do not get fuel pressure with key on engine off (prime) as per the manual. Also if it's cranked enough it will occasionally catch and start. I've found that by removing 1 of the injector wires it will start right up just on 5 cylinders. At this point I am leaning towards a bad MAF since the problem only occurs when the engine is warm But I'm not certain.
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88toyotadeluxe
January 31, 2008.




Maybe try your idle sensorand try changing the plugs if it missesif it is idleing to low then sometimes it will knock and if it idles a little hight it is a bit rough but that an easy fix.

Tiny
Toyotadog
Feb 10, 2008.


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