Question about 1998 Jeep Grand Cherokee
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Posted on Jan 02, 2017
SOURCE: Rough idle until warm
HMM, ya ont get a code unless ya figure out how to read the morse code values the OB1's use. Hmm sputters, and rough idle can be from poor air circulation, as well fuel delivery.
first air.......inspect and clean your vacuum hoses, cracks and leaks will most notably ruin your day. as well as the performance of your ride. check the seal for your intake hose around the throttle body, then clean the ports in and around your throttle body as well. Bad air supply, poor idle.. follow me..
second is fuel delivery. Your getting your gas, thats evident, but are you getting the required amount. hard to guage unless you disconnect a line and test its pressure. so lets USE the KISS method.. KEEPING IT SIMPLE STUPID
first, check and or replace your fuel pressure regulator...
second, inspect condition of your fuel filter.
thrid, and certianly the last thing, your fuel pump. go in that order. or your gonna seriously annoy yourself when a 5 dollar fix turns into a 3-400 dollar fix.
Posted on Nov 19, 2008
Hey Mike, it sounds like a problem with the ECM or a wire going to it, if the wires sheath does not look damaged I'd say that it's probably dry joints in the ECU. If you were to take the ECU to an electronic service shop it will likely be a lot cheaper than getting a new unit. I'm not sure what you mean by the federal emmissions ecm i'm in Australia, we don't have those.
Posted on May 25, 2009
SOURCE: I HAVE 95 JEEP GRAND
Had similar problem with 96 Jeep 4.0L engine. Tracked it down to the connector for the distributor pickup. Spliced in another connector and hasn't stalled since. Also, have you had any codes? Easy way to check on Chrysler products: turn key on, off, on, off, on (not starting) and watch the 'engine light' on the dash. It will flash off/on. Count the flashes with short pauses between and longer pauses between code. When you get a 5 count and 5 count, that is the end. This may also help
Posted on Aug 22, 2009
Ok...you mentioned that there is no spark coming from the coil when it's in no start...Is there power from the alternator going to the coil?
One other item...If the timing chain is worn and stretched, it is possible that the cam sensor and crank sensor are out of phase with each other, just enough where a temperature difference will change starting ability.
One question...while in no start, have you tried changing the throttle position while cranking to see if it lights at part or 3/4 throttle?
Posted on Oct 15, 2009
Suspect fuel pressure. You could install a fuel pressure guage. There is always a fuel pump cutoff safety switch. It is either in oil pressure switch or alternator connection. But have you changed the fuel filter?
Posted on Jan 16, 2010
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