The most reliable way to avoid repeated fuel pump failure for your customer is to replace the fuel tank and use fresh fuel.Īlso, there have been some intermittent misfire issues especially under heavy load with less than half a tank of fuel on 1999-2002 4.7L, 5.2L and 5.9L Jeep engines.
Jeep has never really commented on the true cause. If the fuel looks cloudy, either the interior lining of the fuel tank is dissolving into the fuel or a residue left from the failed fuel pump is contaminating the fuel. To test the system, Identifix staff recommends you a take a fuel sample in a clean, clear jar. This is a common occurrence to the 1993-’98 Jeep Grand Cherokees with the 4.0L and 5.2L engines, as well as 1998 models powered with the 5.9L engine. Technicians using Identifix have identified a repeated failure of a new fuel pump that’s due to either a film on the interior of the fuel tank that contaminates the fuel, or from a residue left in the fuel tank from a previously failed fuel pump. In this article, we’ll address some fuel system complaints that have plagued these vehicles. While it is acceptable for Jeep differentials to make some noise, it’s not wise to ignore noises that are more than moderate or if your customer tells you that noise is noticeably getting louder as they rack up the miles.Īnother common issue that puts Jeeps in repair shops is fuel pump related. Grand Cherokees are prone to having some common mechanical problems, and many of you have probably serviced complaints of noisy differentials. In 2005, a 3.7L V6 engine replaced the earlier I6 powerplants, and 5.7 V8 Hemis were made available under the hood, as well as a more powerful 4.7L PowerTech.
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