Question about 1999 Chevrolet Silverado 1500

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Engine hesitates on excelleration and idle speed changes by itself

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Have tried changing the spark plugs and cleaning the fuel injectors

Posted on Dec 11, 2009

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1 Answer

2002 jetta 4 cyl runs very rough, and firing order seems to be misfiring? engine is not overheating, although once warmed up it lags while excellerating. Noticed that it appears that sparking or arking...


Check timing of the engine is right using an engine timing light. Make sure the timing belt or chain isn't worn or slack. The head gasket could also have gone and may need replacing.

Feb 15, 2014 | 2001 Volkswagen Jetta TDI

1 Answer

My truck turns on, idles fine but when i give it gas it only goes about 3 mph. when i want to excellerate it goes nowhere


Not quite everything is fine.
Is the check engine light on ?
When you push on the gas pedal, does the engine speed change ?
Can you rev up the engine in park ?
What have you checked so far ?

Jan 15, 2013 | 1993 Nissan Pickup

1 Answer

94 jeep grand cherokee. starts,idle. throw warmup. as soon as I touch the excellerator let up the rpm drop & engine stalls.


Most low idle speed problems on these engines are due to a faulty idle air control valve but since you state the idle will go up and return to idle then i would say it is working properly i think you have a throttle body coking problem ( dirt and grit accumulates around the butterfly valve in the throttlebody ) to fix this simply remove the fresh air hose from the throttlebody and open the throttle all the way up use a clen rag and wipe clean you may use a solvent such as B12 on the rag but dont use too much 1_4_2013_4_54_06_am.jpg

Jan 04, 2013 | 1994 Jeep Grand Cherokee

2 Answers

Engine stumbles, hesitates, at low speeds


does it seem to sputter or hesitate when you excellerate through a turn?

Nov 24, 2011 | 2000 Subaru Outback

1 Answer

It seems the battery in my 04 cadillac deville is dead. I know the battery is located under the rear seat. Can I remove it without adverse effects on the computer?


you can replace battery with out effects.first turn off radio.before removing negative battery cable.when you install new battery, when you start the engine let it idle until get operating temperature.the computer will have to relearn it memory while engine idling operating temperature.open throttle a little see if engine hesitate. it will hesitate some, when you can accelerate with out hesitation,engine tps sensor has relearned it position.if idle speed stable engine dont run rough and stall out in drive your pcm has relearned itself where you can drive it.

Apr 03, 2011 | 2004 Cadillac Deville

1 Answer

Car starts ok then stops when you take your foot off the excellerator to back up or go forward.you have to keep your foot on excellorator untill engine warms up.before that if you have to stop at a stop...


clean or replace your IAC, idle air control valve. you can clean it with a can of spray carb cleaner. also clean the throtle bore and plate. use an old tooth brush to get in there.

the IAC controls your idle speed. it can become gummed up with deposits.

use the rest of the carb cleaner to check for vacuum leaks. just run engine and shoot short bursts at hose fittings and connections. The idle speed will change if you find a leak. dont catch on fire doing this!

Jan 29, 2011 | 1997 Mercury Grand Marquis

1 Answer

2006 ford expedition limited edition wth 78,000 miles, while accelerating at a low speed between 25 an 35 miles an hr there may be a shutter/vibration? replaced the spark plugs about a yr ago or 15,000...


try replacing the idle control sensor,$20.00 at most does it rev up and down at all by itself?won't idle or stall when trying to acceorate? this may be your problem$20.00 for part-autozone,advance autoparts. 15minute to replace,my labor$25.00 shop around only 2 bolts to replace 1 plugin thats all. spped sensor about the same price. check engine light on? it may be further issue. thank you for choosing fixya.com

Dec 31, 2010 | Ford Expedition EL Cars & Trucks

1 Answer

99 toyota corolla hesitates while excellerating


Are you one of those people who TOP OFF the tank when filling up?

When the EVAP recovery system soak with few ounce of gasoline......the trap vapor will take few days escape.

EVAP system is design to handle fuel vapor. Few ounce of gasoline can damage the fuel vapor recovery relay and decrease the service live of the recovery lines.

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You can accelerate the process by locating the charcoal canister (near the nose of the car and same side as your gas filler door)

MOVE the car to outdoor.

Disconnect the EVAP line and let it air out by itself.

DO NOT introduce any heat source or fan to speed up the process.

Reconnect this EVAP hose and use a small amount of starting fluid at the intake manifold.


Please post more information by Clicking on the comment link.

I will follow up.

Dec 01, 2009 | 2000 Toyota Camry

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