Question about 1985 Jeep Cherokee

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Hesitation on acceleration whats the problem

Hesitation on acceleration i think its fuel but not sure its a 2.5l straight 4 manuel

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Check how is your TP sensor working, is your check engine light on? if so the problem might be related to a sensor, if not, take it to a certified mechanic so he can work on your car and troubleshoot it
hope this helps

Posted on Sep 26, 2009

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Posted on Jan 02, 2017

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I've got a 1996 jeep grand Cherokee with the 5.2 v8 fuel injected Holley throttle body. My problem is while driving at soft or low acceleration it accelerates fine, but if you hit the throttle hard it


I would check the voltage on the throttle portion sensor with the engine off from idle to wide open throttle.If there are any dead spots, replace the sensor. If the tps checks out, you should check fuel pressure. If you have good fuel pressure, you may want to make sure there isn't a lot of slack in your timing chain. I don't believe you mentioned the mileage of your vehicle. Best of luck.

May 03, 2014 | 1996 Jeep Grand Cherokee

2 Answers

Abs light on 1999 mercury sable


Hesitation problems can be caused by a number of thing's on vehicle's with electronic fuel injection , not like the old days of carburetors where most likely it had a bad accelerator pump . Throttle position sensors (TPS) can get a worn spot that would act just like a bad accelerator pump . MAF sensors (mass air flow ) Can also cause Hesitation plus ruff running , bad fuel economy , a IAT sensor ,(intake air temp ) ECT - engine coolant temp. sensor can also cause this problem . Unless you want to replace all these parts i suggest you have it diagnosed by a qualified repair shop that has the electronic diagnostic tool to test it .
ABS light on , DTC- diagnostic trouble code could be set in the EBCM - electronic brake control module . could be a wheel speed sensor getting ready to fail .

Mar 21, 2017 | 1999 Mercury Sable

1 Answer

Hesitation in acceleration with no check engine light


MOST TIME CAR STUMBLE OR HESITATION ON ACCELERATION YOU.HAVE A SLIGHT LEAN FUEL MIXTURE.CAUSED BY STOPPED UP FUEL INJECTORS OR FUEL FILTER SLIGHTLY PLUGGED.

Jun 07, 2010 | 2001 Audi A4

1 Answer

1986 toyota 4 runner..2.4 efi automatic...has a slight hesitation-miss under acceleration..just been tuned up and didnt cure problem any ideas?


1-Replace fuel filter.
2-Clean injectors
Most of the time an hesitation on acceleration is due to fuel.

May 19, 2010 | 1986 Toyota Pickup 4WD

1 Answer

Hesitation problem when accelerating. Quad 4 has hesitation espcialy when first taking off. New fuel pump, coil packs, fuel filter, throttle pos sensor converter.


Check for vacuum leaks, make sure your PVC valve is operationa. Also be sure to take your car to a place such as autozone where they can do a detailed diagnostic test (usually free of charge) wich will help you further locate the problem..

PCV Valve usualy runs about 3 - 7 dollars, and is usually located on your valve cover attacthed to a vacuum line,

O2, and Fuel sensors may sometimes have adverse effects on engine performance.

May 30, 2009 | 1995 Pontiac Grand Am

1 Answer

Hesitates on acceleration


Does the car always hesitate during acceleration? If it ALWAYS struggles when it starts or ALWAYS hesitates on acceleration then I would say the issue is fuel delivery. If the problems are more intermittent and come-and-go then it could be an electrical issue.

I would start by changing the fuel filter. Changing plugs, wires, cap, and rotor are all good things to do as your budget will allow. I doubt you will have to change your injectors.

If you end up replacing any rubber fuel line, be sure to use the high-pressure stuff made for use on fuel injected cars.

I hope this helps! -Nick

Apr 10, 2009 | 1983 Chevrolet Chevy

1 Answer

Engine surges when accelerating in neutral/fuel guage inaccurate


you have two different problems. first your gauge may have a bad ground or bad sending unit . try fuel injector cleaner as they may be gloged for hesitation .

Feb 28, 2009 | 1987 Nissan 300ZX

1 Answer

2004 dodge caravan 2.4 Hesitates during Acceleration and at idele


You should definitely replace the fuel filter though this probably won't fix your hesitation. It wouldn't hurt to replace the spark plugs this is usually the culprit on these engine. I have the same engine in a '99 caravan and found the for some reason the spark plugs on cylinder 3 and 4 loosen up after one year and cause a misfire between 45 and 50 mph under load (when mildly accelerating).

Jan 06, 2009 | 2004 Dodge Caravan

2 Answers

Strong fuel smell


You more than probably have a gas leak somewhere in the fuel system. If you can smell gasoline, it is leaking somewhere. The lines run along the frame to the engine. The leak might be hard to see or hidden (on top of the fuel tank).

The leak is robbing fuel pressure from the engine, causing it to idle rough, so is probably on the pressure side of the system.

(Most fuel systems, except for "returnless" systems with Pulse width modulated fuel pumps (not very common), have a pressure line and a return line to the tank.

Aug 19, 2008 | 1994 Toyota Pickup

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