Question about 1997 Jeep Grand Cherokee

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Loosing compression when accelerating - 1997 Jeep Grand Cherokee

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Compression is either there or it's not...has everything to do with ring seal and valve condition which does not change with driving conditions. Excessive smoking from the tailpipe can tell you a lot about the general condition of the insides. Likely you have either an ignition timing problem or a partially obstructed fuel filter. You'd need to run some tests to find any sensor related problems.(tests outlined in chiltons or haynes manuals)
Filter and pump can be tested with a fuel pressure gauge but it is usually easier to just replace the filter first.

Posted on May 06, 2010


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Posted on Jan 02, 2017


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My audi a4 1.8T is loosing power when i accelerate

This could be a lack of fuel pressure from the electrical pump at the tank. The best way to locate a leak is to have the engine running and warm and then spray lighter gas around each joint in turn. If the engine rev's up you've found your leak.

Aug 30, 2017 | Audi Cars & Trucks

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Why did i loose compresion on my 2001 suzuki grand vitara 2.5liter when all i did was change valve cover gaskets and spark plugs? Now there is no compression? I'm really confused

7 posts and all great answers ignored. (a new record that 7 posts)
post the compression on all 5 cyliners
post the hard numbers, !
and do it with the :
  1. throttle blocked open
  2. battery charged
  3. all spark plugs removed for max RPM and full pressure.
150PSI or more, mine does 180 easy/ H25 is mine too.

you messed up the CMP sensor then did compression wrong.
so.... do it right. this time.

i bet:
spark is dead.
or timing way off due to CMP fiddling. or its connector is not on right.

or blew fuse, due to skipping step 1 in the FSM book, for VC gasket change outs. (factory service manual , read it yet? )
step 1: pull battery neg lug, first.

Mar 27, 2015 | 2001 Suzuki Grand Vitara

1 Answer

Acceleration is horrible. It's like it's not getting enough gas. New carburetor 2 y/o. Takes a while to get up to speed.

Fuel filter first. Maybe the timing belt has slipped a notch? Clogged catalytic converter or muffler? Loose throttle cable? Too many variables without pinning it down a bit. Proper oil changes? Compression test? Tuneup? Too much gas can act like too little because it snuffs the spark. Tip off is horrible fuel economy.

Jan 28, 2015 | Cars & Trucks

1 Answer

Engine sputters accelerating

no year? no engine? GC ,, . (crd 56?)

there are many engines, used, so we cant guess that.... and is totally Germain.
here ill tick off a few, for low power, and there are many simple tests.
  1. a tuneup, do the 60,000 mile listed tuneup now. Bam, runs.
  2. low compression on any cylinder. or all.
  3. bad spark (see tuneup)
  4. if 1996 and newer, scan it , in USA scan the ECU/PCM.
  5. bad fueling? too little or too much.

this is engine power, we need the year, the cylinder count and displacement. of said engine.
here is a shop manual.. 93-2004 years

Mar 02, 2014 | Jeep Cars & Trucks

1 Answer

Loses power

How many miles? What year? Have you check the air and fuel filters? Have you changed plugs? The rest of the tests would be: Check fuel pump pressure and volume, check compression, check timing and advance, check catalytic converter.

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1 Answer

Loose compression engine

Not sure what loose compression is, but low compression would not be affected by changing the plugs unless the wrong plugs were installed.
The timing belt may have broken, but again that would not be caused by replacing the plugs. I would run a compression test to verify the problem.

May 29, 2013 | Mazda MPV Cars & Trucks

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loose compression,you need to either tune it up or recalibrate .

Aug 14, 2012 | 1994 Mercury Grand Marquis

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Loud ticking/knocking/rattling sound when I start/accelerate

hi is it miss-firing as it sounds like a knocking noise can be anything but if you can feel it on the accelerater pedal then the noise sounds like its on the inlet valve side which would transfere the noise up the throttle body where the accelerater is located it could be something as simple as a tappet come loose to a burned valve you need to have a look do a compression test and take the rocker cover off see if theres anything come loose yates210456

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Air Condition

it sounds like a loose compression compressor.

if the compressor is loose compression, normally it sounds noisy. then suction pressure is above normal and if you accelerate and maintains that high speed, let say 2000 rpm, the suction pressure goes down to the normal level and cools your air conditioning .

tnx 4 using fixya...


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No power up hills

The engine has a compression problem.
Check if the engine is consuming water or coolant liquid.
If coolant liquid level is slowly going down as you drive then you have an head gasket problem, and that is the reason for loosing compression.

If not you will have to check caburetor settings or electronic fueling depending on the engine.

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