High Idle on Toyota truck!!?

Marine Country Boy

Ok, my 1989 toyota pick up 4x4 has a high idle, what could this mean and what can i do without taking it to the shop, i don't have the time to time to take it and not the money either, all my money goes to my Baja trucks and my horses.....















Does it help if i tell you that it stick, it was in bad condition when i go it 2 years ago and i am just now starting to fix it up....















it is fuel injected

Chris

The most common problems for high idle on these trucks would be the fast idle valve or a vacuum leak. If you don't see a disconnected line, I would take it to a shop where they will be able to check for restrictions. Should not be but an hour or two in labor. If this isn't something you can do then I would get a Hayes Manual to locate the valve and passages you need to check.

HOLEY MUFFLERS

to add, support,















another common issue is the engine temp sensor on the block and the cold start injector circuit. which is prolly what Chis is referring to. (respect if i'm wrong)















and you don't wanna just up an adjust the idle. likely end up with idle fluctuation compounding trouble shooting.















idle up circuit for the power steering is in play here as well. vacuum lines going through the switching valve on the pump itself going up to the intake where a t-fitting is sitting on another valve(idle up).































otherwise,















you can pull codes. don't need a scanner. a 6" piece of wire with two alligator clips and your keys is all you need. have the light blink at you,















http://www.ncttora.com/fsm/1993/engine/26diagnosi.pdf















then i cross reference the codes with the trouble shooting table,















I4,















http://www.ncttora.com/fsm/1993/engine/3troubles.pdf















V6,















http://www.ncttora.com/fsm/1993/engine/63troubles.pdf































those are fully index-able. so clicking on a link takes you right to testing/servicing of a given component.















FYI, not all codes stored prompt a light. and codes pointing to sensors don't necessarily mean a sensor itself is bad. they need to be tested, checked good, the component/environment they monitor comes into play. i just see that to often.































reason why i said that was cause if it's a generic vacuum leak, or even a faulty VSV (vacuum switching valve) that would likely trip an induction sensor code of some sort.































when you're done, pulling the 15 amp EFI main fuse for 30 secs resets the ecu.































FSM for '90-'95.5,















online,















http://www.ncttora.com/fsm/1993/index.html















dl,















http://www.ncttora.com/fsm/1993/1993.zip































the FSM is app for your truck even though it says 90-95.































www.ncttora.com