Misfire at start up
#1
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Join Date: Sep 2014
Location: Mexico
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Year: 2011
Model: Grand Cherokee
Engine: 3.6 L
Misfire at start up
Hi, I am new to the Forum today, and also have a '99 Wrangler: I have had great help from the Wrangler Forum, so I am hoping that this Cherokee Forum will help me solve the first and only problem I have ever had with my 2011 Grand Cherokee. I bought the Cherokee new in the US and brought it to Mexico, it now has only about 25000 miles on it. Suddenly I have a problem at start up in the morning. The engine turns over OK and it sounds as though it is trying to fire on one or two cylinders. If I persist, it will eventually start and it runs perfectly all day. I wondered if the fuel pump was bad and/or if I was losing fuel pressure over night. Any help would be appreciated... I am a long way from any authorized repair facility.
#2
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Join Date: Nov 2010
Location: In the middle of Minnesota!
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Year: 1999
Model: Cherokee
Engine: 4.0
If I were you, I would perform some basic fuel pressure testing for starters. See what the fuel pressure is after the vehicle sits overnight. You need a certain amount of fuel pressure for the engine to fire. Can you get your mitts on a fuel pressure gauge?
Last edited by cruiser54; 09-07-2014 at 05:49 PM.
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