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How to fix rough idle of a 1991 Toyota pickup

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 42 Answers

SOURCE: Rough idle until warm 22r

if it is a carburated engine it is probably the a.a.p. diaphragm in the carb. if you remove the air cleaner and look on the side of the carb that is towards the valve cover near the front yow will see a vacuum hose going to a cover that is fastened with 3 screws. if you pull the vacuum line off you will see that there is probably fuel being sucked into the line due to the leaking diaphragm. the vacuum source is temp controlled and cuts off when warm. but when cold sucks fuel directly into the intake. remove the 3 screws to replace the diaphragm, being carefull of the spring. good luck!

Posted on Dec 18, 2008

  • 1 Answer

SOURCE: Idle surges after warm up and when brake pedal is pressed

1990 22re same problem surge when pedal was depressed thought it was booster or check valve still didnt fix it i even put a brand new booster on it just to make sure still no fix it finnally went away on its own for about a month now it does it just sitting at an idle with out the brake pedal depressed traced all vaccum lines no problem there and still have no clue

Posted on Feb 21, 2009

  • 112 Answers

SOURCE: Removing rotor on a 1991 toyota 4x4 pickup

You have to take apart the 4x4 hub to get to the lock nut for the bearings then you have to reome the hub and rotor assy,then you have to press the wheel studs out to remove the rotor,then reverse the process.

Posted on Mar 29, 2009

  • 4 Answers

SOURCE: 1991 Toyota pickup 4WD clutch slipping

There is an adjustment for the clutch pedal under the dash where the push rod goes thru the firewall. There is only aprx. 1/2" of adjustment so be careful when making an adjustment, if your clutch is slipping then you need to shorten the throw of the push rod.

Posted on May 07, 2009

localwonder
  • 6784 Answers

SOURCE: 91 toyota pickup 4cl idles rough when warm when brake is pressed

HI, i would advise to check the following areas for faults. replace any part that is fouled or malfunctioning.

1. Check the air filter- This device may be clogged or dirty. replace if visibly fouled.
2. Check the fuel pressure regulator- pull the vacuum hose of the regulator. if there is gas in it, replace the fuel pressure regulator.(if there is no fuel present in the lines, move on to the next check point)
3. Replace the fuel filter and, check the voltage at th fuel pump. you should get 12V at the pump. if its lower than twelve, chekc the ground for corrosion as well as the entire wiring harness as well. all the way to the relay for fualts.
4. Check the Intake Manifold Gasket for worn or damged edges. this ware and tare will cuase leakge. replace this gasket if found to be fouled in any way.
5. Check the freash air intake hose. this hose may be clogged or damaged.
6. Last but not least, check the injectors for leaking seals and, correct pulse as well. replace any injector with a weak pulse or , leaky seal.


Posted on Jul 19, 2009

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Perform tune up (sparkplugs, airfilter, wires, distributor) clean throttle body with throttle body cleaner.

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It can be issue with fuel pressure,its low or the problem relates to faulty spark plugs.
There are few troubleshooting steps to confirm the problem.I suggest you few help links,with complete troubleshooting and solution for these types of issues.

1991 Toyota Trecel: Engine Starts fine but dies when gets Warm? http://whatisbyme.blogspot.in/2012/05/1991-toyota-trecel-engine-starts-fine.html

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http://howtobyme.blogspot.in/2012/05/1994-toyota-pickup-starts-fine-but-dies.html

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1994 Lexus ES300: Engine Idles Rough and Dies? http://whatisbyme.blogspot.in/2012/05/1994-lexus-es300-engine-idles-rough-and.html

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These help links will help you to troubleshoot and solve the issue.
Thanks.

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If not wrong this engines also need a valve lash adjustment time to time even do this littl eng. 22RE runs rough normally, try it wont hurt.

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I would check for a broken vaccuum hose . A vaccuum leak will raise the idle considerablly.

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You may just have to service your yhrottle body and run a fuel injection service... also inspect your idle control motor.

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try a tune up plugs, wires, air filter,check fuel filter clean throttle body check for restrictions with you exhaust

Aug 30, 2009 | Toyota Pickup Cars & Trucks

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Idle surges after warm up and when brake pedal is pressed


1990 22re same problem surge when pedal was depressed thought it was booster or check valve still didnt fix it i even put a brand new booster on it just to make sure still no fix it finnally went away on its own for about a month now it does it just sitting at an idle with out the brake pedal depressed traced all vaccum lines no problem there and still have no clue

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