Question about Cars & Trucks
Motor starts up & idles step on gas pedal engine stops running the motor will start right back up & ldel press on gas pedal dies again
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Posted on Jan 02, 2017
if battery is weak the idle air control solenoid will search for the right position and stall have battery load tested if good put in a idle air control solenoid..
Posted on Feb 26, 2009
SOURCE: 1990 toyota pickup 3.0 v6,engine
This is an unfortunatly common problem with this vehicle, if my hypothesis is correct. Try this: disconnect the wiring connector going to the fuel tank, under the bed. Replace the fuse and crank the engine. If the fuse does not blow, then the power wire going to the fuel tank sending unit is shorted out to ground. I change about 15-20 fuel sending units a year for this exact same issue. Replace the fuel tank sending unit if the fuse does not blow. When you get it out, you will see the cause of the short, rust at the connection on top of the sending unit. Hope this helps.
Posted on Sep 15, 2008
Just trowing some suggestions out there, but, I would check the idle air control valve (solenoid) or the throttle position sensor. If they check out then my last guess would be the map sensor or the vaccuum to the map sensor. Hope I was able to help. Best wishes.
Posted on Jan 17, 2009
you might have carbon build up on the throttle plate, take your breather off, spray the heck out of it with some carb spray and also down in the IAC really good. The when you start it, you will have to floor it until all the black smoke is gone. Then take it out on the highway as you are in a Nascar race.
Also your egr valve might be stuck open, and even a intake vacuum hose leak. you EGR being stuck open with cause you a rough or if any take off. Take the EGR off and check it for carbon build up also, if so try to just scrape it off. If thats not possible, youll have to replace the EGR valve, those on that car vary around 130.
Posted on Mar 05, 2009
I just worked on this problem a couple of days ago. If the motor is a 3.0 liter. The idle control valve is located at the bottom of the throttlebody assembly right below the bore for the throttle butterflies..What usually causes this valve to go bad is the mechanical part of the sensor sticks as it becomes sludged or carboned up. Manufacturer claims that the valve cannot be cleaned and should only be replaced....It's a high dollar repair to replace this sensor as your engine coolant flows through this electrical valve. The valve idles the car fast when cold, as the antifreeze gets hot the valve drops the idle down.....I have successfully cleaned several of these valves and cured the dying problems...
First remove the air filter top cover and the tubes that connect to the throttlebody. In the right throttlebody you will see a port right before the butterfly. Under the throttlebody you have a black plastic sensor with a 2 wire terminal. Remove the 2 phillps screws and pull off the electrical part of the valve. you will feel a magnetic pull while removing. Remove slowly and catch the black sealing oring, and there will be a metal washer also.. The shaft that is exposed is the mechanical control of the valve. Rotate the shaft and it should feel sticky if bad..Using a throttlebody spray cleaner spray into the small square port of the right bore, rotate shaft and spray until stickfree.....Reassemble
Posted on Apr 05, 2009
Tips for a great answer:
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