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My car jerks while accelerating.

My 1997 ford festiva jerks alot, like its miss-fireing, it only really happens when im accelerating or driving up hill. Am I right in thinking that there is a problem with not enough fuel or air is getting into the engine? If it was an ignition problem wouldn't it happen at all times rather then just when accelerating? I have changed the spark plugs and fuel filter but it hasn't helped. I'm sure there are a number of possibilities it could be, im trying to tick off the most likely possibilites so that the cost dont get too high, its only a cheap old car anyway but would like to keep it going if i can. Any ideas would be really appreciated.

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I would check to see if you are getting the proper air to fuel mixture first, be it a carburetor with adjusting screws, or a computerized injection setup where you need a computer hooked up. Then I'd check the timing. Sounds like your timing may be off. You may have an older model with a distributor cap. With the car running slowly spin the distributor cap clockwise and then counter clockwise (SLOWLY). You're not unscrewing a jar of peanut butter. You should hear the cars idle fluctuate. Spin it about a quarter turn in each direction until you find the cleanest spot. Good luck!

Posted on Apr 03, 2017

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If you have the original fuel pump, it might be time to replace it. When you try to accelerate the fuel pressure could be low with an old fuel pump. Going up hill might mean that the tank is lower in the rear and requires more effort to move the fuel. Other symptoms would be that it takes a bit more time to start in the morning or when cold.
Just a couple of thoughts...

Posted on Apr 03, 2017

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Missing under acceleration can be from low fuel pressure ---check fuel pressure
from maf / vaf MAP sensors
problem injectors --partially blocked and not allowing full flow at acceleration
ecm problems
problem cat converter cracked and partially blocking the exhaust prevent full exhaust gas flow when the acceleration is required The cheapest option is to put a good quality injector cleaner through the system and give it a good run to see if it clears up
next is a fault code reading, free at auto zone or like store, to determine sensor problems and from there it could get expensive

Posted on Apr 03, 2017

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Posted on Jan 02, 2017

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SOURCE: 2000 ford explorer 4.0 x-engine is stalling, missing and lose power while driving

I personally would check the fuel pressure. Then I would go back to the coil. I have seen brand new bad coils out of the box. The symptoms of a loss of power point to this component, especially if the car idles well, but loses power when accelerating. Please do not rate this reply - we all are left to grasp at straws since you have changed pretty much everything. Good Luck. Please post the final fix of the problem.

Posted on Oct 28, 2008

tragedy lok
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SOURCE: my car jerks really hard and doesnt accelerate

does it **** whike driving or just when ur changing gears?? do u have overdrive? going up a steep hill is going to be tough for a little motor anyway if u have o/d take it off overdrive before u start climbing the hill this will help u there if its some thing that just started happening let me know heres me email [removed by staff] if u feel comfortable plz email me here

Posted on Oct 21, 2009

  • 39 Answers

SOURCE: 1997 Buick LeSabre, 54,000 miles

remove plugs and check for carbon tracing . if found plugs and wires will fix problem

Posted on Oct 24, 2009

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SOURCE: 1992 pontiac grand am no acceleration, a rough idle (engine miss)

Does it have the 2.3l Quad 4 engine? If so replace the plastic piece that the coils go into, they go bad and leak spark to the cam towers and then you get a nice one or multiple cylinder misfire.

Posted on Apr 30, 2010

  • 6 Answers

SOURCE: I have an on-going problem with my 92 accord not

The main relay is bad. This is located on the driver side above the fuse panel. What happens is the temerature warms up and the soldier seperates. You can either replace this or re-soldier it. The part number is RZ-0088, you can get a new one on ebay. You will need a 10mm socket to get it out, it is behind the cruise control module.

Posted on May 12, 2011

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