Question about 1999 Jeep Grand Cherokee
Which engine, ??? we can not guess this. ever. nor help well.
6 engines used. world wide. just a tiny clue here, size matters.
stalls at stop lights.
1: needs a tune up? spark plugs?
2: if rpm is lower than 800 RPM hot, (A/c off) then the idle controls are failing. that is caused by many things, ask.
Is the CEL lamp glowing running, I bet it is, and if it is, that means
SCAN IT. Scan it and see the errors. DTC errors.
anyone can rent a scan tool, or get help, scanning it.
if car has an EGR valve, it can stick open and stall at every traffic light. so can sticking ISC motor (idle speed controller)
many jeep engine have no EGR, its done with fancy cam timing.
i cant speak for all 6 engines at once, so do post engine, size.
or its all just guessing....
more guesses. too high fuel pressure.
dead clogged injectors.
ECT stuck at -40F
thermostat (coolant) stuck open. flooding, and fouling sparks plugs.
and 25 more. ask.
or scan it. and tell engine size.
Posted on Apr 17, 2014
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Posted on Jan 02, 2017
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