Question about 1997 Jeep Wrangler

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2.5l 4cyl engine

Why does my 2.5l engine idle fine when i first crank it but then idle terrible for about a minute before smoothing out again without any more problem? This happens every time i crank it, warm or cold.

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Check to see if you have any codes come auto zone can do this for free if you do not have a reader..sound like a tps (throttle position sensor)

Posted on Nov 18, 2008

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Posted on Jan 02, 2017

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1 Answer

2010 Ford F150 would suddenly loose power and only idle. Pull over shut off sit a couple minutes crank and run fine for a while then do same thing again. Wrench would show up on instrument panel


Sounds like the catalytic converter or muffler maybe getting plugged up and the computer is putting the truck in limp home mode. Did you put a scanner on the truck. You might try to remove the 02 sensor ahead of the cat and see if it runs a little better it will not be perfect but should stay running if so do an exhaust check. When the cat or muffler gets plugged it puts back pressure on the engine and won't allow the fuel to be pulled into the engine properly.

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1991 Cadillac DeVille (has 110,000 miles on it) suddenly dies while driving. Starts and idles fine, but shuts off after driving only 1-2 blocks. What's wrong and how do we fix it?


There are many things that can contribute to this problem. It sounds like it may be ignition related. Possibly an ignition control module or ignition coil. The check engine light coming on while driving is the key to finding the problem. The light comes on when the computer finds a problem and will then store it in its memory. Have the codes checked for what the computer has found to be at fault and with a little diagnostics, should lead you to the problem

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1 Answer

2004 5L Hiace fails to start however whines.


this is the first thing i would do since it has not run for a long time.
1 make sure it has fuel, check filter, loosen the bolt securing the fuel line to the pump and see if fuel is coming out, if it does you have fuel in the injection pump. retighten.
2 loosen nuts on injection lines to injectors 4 if you have 4 cyl. eng.
and crank the engine (start) until you see fuel coming out from each line then re-tighten lightly. start the engine*, it may take a while for the engine to run if the glow plugs are not working properly. once the engine is running its time to bleed or purge air out of the line, to do this
loosen one at a time the nut you have re-tightened lightly until fuel and air come out, tighten when no visible air bubble only solid fuel stream. do this on the rest of the injectors, you will feel the engine run smooth.

*if there is no fuel coming out after continuous cranking the engine for 30 sec to a minute, injection pump may have a problem possibly the rotor vanes inside the pump is stuck due water in fuel and engine not running for a long time. you may have to have the injection pump overhauled and recalibrated.

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My 2001 Corolla displays P0171 after it idles for a minute or two. If I drive it hesitates (especially under hard acceleration) and starts also displaying P0300, P0301, and P0302. If I clear the codes...


po171 is lean on bank 1--===causes --MAF/VAF sensors --injectors ---HO2S (heated oxygen sensor)
po300 is random misfires and po301, 2, 3 4 5 6 etc is the cylinder that is misfiring
most likely that the fuel pressure is below the required pressure either from the pump or blocked filter or the tank not venting properly--- (EVAP) problem
check the fuel pressure ( minimum of 45-65psi) --problem pressure regulator , pump or filter
replace the heated oxygen sensor on bank 1 ( in the exhaust manifold before the cat converter) as it reports to the ECM to get the correct air/fuel mix

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1 Answer

Long Crank Time When Hot


Timing belt/chain may have been put it slightly off time, when motor rebuild

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DTC PO300 and PO506 engine won't idle when cold


CODE PO300 MULTIPLE ENGINE MISFIRE DETECTED CONDITIONS. CODE PO506 IDLE SPEED TOO LOW CONDITIONS.LOOKS LIKE THE IDLE SPEED CONTROL IS NOT WORKING.

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99 hyundai accent starts sometimes. not battery


ok when the check engine light comes on that usually indicates a engine malfunction...what you can do is go to your local autozone and they can do an OBDII test for free..my bet says it is the cam or crank sensor.. DO NOT SHUT THE CAR OFF AT AUTOZONE..LOL

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Engine coughs and sputters, won't start


its sounds like it has jumped time
you might want to check that

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