Question about 1998 Jeep Grand Cherokee

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My jeep 6cyl oil has twice amount smells like gas no water bubbles engine runs very rough smokes no power I thought of fuel rail regulator but cant locatr it

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Your pcv valve might be plugged check to see if it rattles

Posted on Oct 12, 2010

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91 4.0 6 cyl Rough ideal wont stay running. blue smoke


Blue smoke indicates engine oil being burnt, sounds like piston ring are knackered.

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Black smoke from exhaust


Black smoke is an indication of too much fuel-running rich-in the cylinders. The air/fuel mixture is way off-too much fuel. Possible causes are cylinder misfires (runs and idles rough, a noticeable miss), leaking fuel injectors, or a failed fuel pressure regulator.
Take off the vacuum line to the regulator (on the fuel rail?)-if there is evidence of gas in the vacuum line, the regulator has failed and excess gas is being sucked into the engine through the vacuum line.

You should take a fuel pressure reading to check pressure against the specification for your car.
Also possible that the fuel metering is correct, but the air being supplied to the cylinders is lacking. A clogged air filter could cause that, but you would also experience a rough running condition. Since you didn't mention that, I would think the fuel metering is wrong-too much gas.

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Dec 22, 2009 | 1989 Chevrolet S-10 Blazer

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My Mazda starts rough and idles real rough with black smoke and smell of gas after warm runs great


Dear Smoker.......Sounds to a trained ear that this little guy is gonna need a fuel pressure regulator. It is basically dumping an excessive amount of fuel with the black smoke and all and once it gets warmed up it runs a little better cause it's out of the closed loop cycle. Check the fuel pressure regulator...pull the vacuum line off of it and if you can smell gas or see gas drippin out....that regulator is junk!!! The pressure regulator is on the fuel rail on top of the motor by the way...this should cure your woes.....if not..please get back to me... I HOPE I COULD HELP!!!

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Got truck started & it blew large amount of gas from tailpipe with white smoke & truck died. can get truck started but it idles hard & pure gas coming from tailpipe


sounds like you have a regulator problem if your fuel pump has a built in regulator it might have went bad or if it is separate from the fuel pump it may be bad. fuel injected engines have to reicive the right amount of fuel if your regulator is not workin its dumpin to much fuel into the engine

Aug 12, 2009 | 1993 Ford Ranger SuperCab

1 Answer

Gas smell when starting and small dripage when back up from under engine


It sounds like the return fuel line is leaking. There are two fuel line and one is the high pressure line which goes to the fuel pressure regulator then to the fuel rails. There is then a return line from the fuel rail to the gas tank.
With the amount of fuel leak, it's going to be the return line since it's not that bad compared to the high pressure side. Follow the fuel lines from the drivers side around the steering shaft to the engine. The high side and low side (return) run side by side and you should see it leaking when the engine is running.
Good luck and hope this helps.

May 25, 2009 | 1994 Chevrolet Beretta

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Fuel injectors leak at fuel rail


Get some new O-rings, and this time put oil on them before you insert them into the fuel rail. The regulator is alright.The problem is that the o-rings can roll up, or twist when push em in dry. Had this problem once, easy fix, but was frustrating.

Mar 30, 2009 | 1989 Nissan 240SX

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Gas smell in oil


The white strip of fluid on the oil is a slight amount of coolant getting into the oil . The water could be from condensation on the dip stick. I would drain the oil and just put regular recommended oil in it with a new filter. I would pull the spark plugs and check for any coolant or oil residue on them.Then drive the vehicle a little and check the performance. If there is unusual noise from the engine then or blue smoke from the tailpipe the engine has internal damage.

Assuming the engine performance stays the same. There could be a fuel injector sticking intermitantly.

Mar 15, 2009 | 2000 Ford Explorer

1 Answer

When i start my car you smell gas ,and it smoke.


HTML clipboard If you can smell gas ONLY when the engine is running, then the gas didn't get burned completely. It could be the combination of the computer, oxygen sensors, and/or catalytic converter is going bad. If you could smell gas when it's parked, you might want to take it to a mechanic to have your gas line checked for leaks and for pressure test. Here's a website that talk a little about gas smell www.mycarsmellsbad.com good luck.

Dec 12, 2008 | 1999 Oldsmobile Alero

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