Question about 1994 Chrysler LHS

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Car runs rough

Car runs like it skips and uses more gas than it should. When you drive it it runs fine. Is it the egr valve?

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If the EGR was bad the engine wouldn't idle. do u have any sytem trouble codes, that is the 1st thing to do, have the dealer test the system.

Posted on Oct 02, 2009

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2 Answers

Engine runs rough wont idle in drive


1. replaced the air filter
2. replaced the PCV valve
3. inspected the PCV hose and connectors (nothing wrong)
4. ran a tank of gas with fuel injector cleaner
5. tested the EGR valve by pulling the vacuum hose off the top, and blocking the hose. The idle didn't smooth out. I applied a vacuum to the EGR valve manually and the car immediately stalled which tells me that the EGR valve itself is working fine.

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Where is the egr valve on a 99 Ford expedition


The EGR valve is in a very difficult spot to work on. If the EGR is bad it will set off the check engine light and make the vehicle run rough or stall at idle. It really doesn't make it run rough while driving or accelerating. What are the conditions when the car runs rough?

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Acting like it is out of gas while driving


the petrol smell could from a faulty canister purge valve or EGR valve That would also account for rough running as the tank venting system would be affected.. Fuel pumps are check with a pressure test not a code reader and that also tests the regulator valve in the fuel manifold. I am surprised that no codes showed up as there would be faults recorded from the rough running engine and I wonder if the scanner was connected correctly as every data plug is connected differently.

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Have a code 71 derm modlue fault what to do


CODE 71 (EGR problems). If you get the code and your car is running rough at idle, it probably means that there is too much exhaust gas going into the intake. That means that the EGR valve is probably stuck open. If you get the code and your car seems to be running fine, then your problem could be a number of things.

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1993 3.4l camaro Idles fine when first started. After a few seconds it idles rough and rpm drops. No power when driving. RPM will not go above 3000 even if floored when driving.


there are a few reasons to ur problems 1st check and or replace fuel filter -check and or service egr valve -carbon usually builds up in and around valve causing rough idle -no power and can cause non start problem ---also air filter - fuel pump-bad gas -timing skip-pcv valve-catalytic converter clogging these are some of the problems usually one of the first 2 is the problem good luck

Jun 21, 2011 | Chevrolet Camaro Cars & Trucks

1 Answer

When warm the car does not idle. when its cold it starts and drives fine. when it warms up it shuts off and idles rough.


Find the egr valve on the intake. Look up on the internet what it looks like because it is difficult to describe. There will be one vacuum hose attached to it. Start the car and let it warm up. when it starts to hesitate remove the hose. If the engine holds idle, you need to replace the egr valve. The egr (EXHAUST GAS RECIRCULATION) valve allows the engine to re burn the exhaust gas when the engine is cold to clean up the emissions at the tail pipe. They tend to get stuck in one position from carbon build up and need replacement.

May 23, 2010 | 2000 Buick Century

1 Answer

How do i test egr system on 93 toyota camry


Testing steps:

  • Remove the vacuum hose on the top of the EGR valve and plug it.
  • Connect a short hose to the EGR valve.
  • Start the car.
  • Now **** on the hose, or use an appropriate tool to apply suction to the line
  • this will open the EGR valve the engine should stumble and try to die.
    If it does the EGR valve is working.
There is an "Exhaust gas manifold pressure sensor" that measures the exhaust gas flow to the EGR valve. The problem is the sensor itself becomes clogged with exhaust carbon and gives the computer a fixed false reading, the computer in turn sends too much vacuum to the EGR valve and the engine runs rough, surges and may die.

Apr 25, 2010 | 1999 Toyota Camry

1 Answer

I have a 1997 jimmy and it cranks up fine but it starts bogging down when i am driving and when i try to climb a hill


You may have a clogged up egr valve. When the egr valve gets clogged up with carbon, the truck will run rough, surge stall, and be very anemic on power. Is the service engine soon(check engine) light on? I've dealt with this issue before, and those 4.3 v6's tend to get egr issues. Try this: when it bogs and runs rough, stop truck, open hood, and tap on egr valve base( where it bolts to engine) if rough running clears up, there's your problem. Egr valve is located on front of engine just to the rt of alternator bracket.

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2 Answers

1995 gmc jimmy 4x4 rough idle smell gas from tail pipe


To check EGR valve, plug the vacuum hose to it, and it should not get hot anymore. It if does, it is leaking.
But gas smell is usually bad plug wire or plug.
With good insulation, remove one sparkplug wire at a time, to see if one has no effect. That is the target.

Jul 25, 2009 | 1995 GMC Jimmy

2 Answers

Jumping and skipping, feels like the car might just die


That is an EGR code, replace the EGR valve and it should run fine again.

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