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When i start the engine it runs wide open - 1991 Ford F150

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Throtle gets stuck wide open i did tps worked for a day always pump to start runs ruff then goes bamm gets stuck wide open help me


You should not need to pump the throttle. That does not have any effect on starting the engine on a fuel injected car.
How do you un-stick the throttle ?

Dec 29, 2015 | 1999 Cadillac DeVille

1 Answer

Had 2 problems occur at same time after some repair. 1st. After repair started up an engine runs wide open with no throttle .Checked an cleaned T>P>S. an throttle body . Checked for vacume...


The only way an engine can run Wide open is if the throttle plate is opened all the way, allowing a large volume of air in to the engine. Check the throttle plate and see if it is hung up or possibly the throttle cable is frayed and holding the throttle open. It is not the injectors, they operate on inputs from the PCM.

Nov 13, 2010 | 1999 Jeep Grand Cherokee

1 Answer

When starting car engine will rev wide open.


check the throttle return spring, possibly broken or has come off

Jul 23, 2009 | 2001 Lincoln LS

1 Answer

2001 mercedes c240 has a really rough start but when the car almost dies I turn the car off wait 3 seconds and it starts perfect. Next comes the issue with having to warm it up before driving anywhere...


Gasoline- thank you. Warm up is not an issue like diesel is. Sounds like the choke is is either wide open or over choking. With the engine cold, remove the air cleaner and note where the plate is at the opening of the carb. If it is wide open then without touching anything else and engine not running, step down on the gas pedal and see if the choke plate reset itself to restricter the carb inlet. If it didn't, then take some WD 40 and spray the linkages and the rod ends holdin the choke plate.By hand work the plate and linkage holding the gas open at the carb. Then set the plate to wide open and do the gas pedal thing agan to see if choke sets itself back to restricting the carb intake. If it does, start the engine and as the engine warms upm the choke plate should start opening on its own and you are off and running. Roitine question. Is your air cleaner clean? If the choke plate needs adjusting. get back to me. K? Good luck Remember to press the gas pedal down once before cranking. That sets the choke for cold start. Hope this helped you Good luck Note, the WD40 won't hurt anything but avoid spraying with engine running or when engine is hot..

May 12, 2009 | 2001 Mercedes-Benz C-Class

1 Answer

1993 chevy 1500 starting problem


I think your engine has a vacuum leak, check all of your hoses, and carb fittings.
If your engine cannot get enough vacuum it will not be able to draw enough fuel to run.

Jan 19, 2009 | 1993 Chevrolet K1500

2 Answers

When I start my 1996 Previa the engine revs up wide open


Have you removed the intake hose and checked that the buterfly is closed. If so does it open up on its own accord when engine starts. If so check all linkages and return springs. If it has a cable operated throttle and the butterfly is not opening then you have a massive air leak into the manifold via a breather hose or the likes.

Dec 12, 2008 | 1996 Toyota Previa

2 Answers

Idles to fast


When I crank my truck it runs wide open for a minute of so and then it starts to idle down. What causes this? It is a 1992 Chevy S10 v6 pickup. How can I fix this problem? I have no manuel on this vehicle for a diagram of the engine at all.

Thank you. Dave

Oct 16, 2008 | 1992 Chevrolet S-10

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