1988 Toyota Pickup Rough Idle and Hard Start When Warm

Tiny
88TOYOTADELUXE
  • MEMBER
  • 1988 TOYOTA PICKUP
  • 6 CYL
  • 4WD
  • MANUAL
  • 258,000 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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Thursday, January 31st, 2008 AT 7:23 PM

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Tiny
TOYOTADOG
  • MEMBER
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.
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Sunday, February 10th, 2008 AT 9:48 PM

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