Question about 1998 Jeep Grand Cherokee
Won't turn over or start but sounds like it wants too
Which engine of the many, ??????
no start but cranks ROBUSTLY right?
turns over means zero, the starter motor and engine both can TURN OVER thus , no meaning, What counts is the crank shaft spins.
1: check all fuses on both boxes.
2: Is dash I/P cluster CEL lamp glowing keyon?
3: I then connect my scan tool and crank for 5 seconds, not 4 , but 5.
3A: got DTC's (errror) for CMP , CKP or spark or dead RPM?
thats 4 checks,, got them, ? yes, BINGO.
the ECU will not INJECT fuel of those are bad. ever.
there are exceptions, but those guys get lawsuits....
4: above is ok , i check spark (some do this first. sure thats makes sense , always)
5: ok I got spark on all cylinder, NO , fix that or do step 3 again.
6: i try test fuel, I spray it in and BAM it runs for 3sec, and dies.
if it dont run, are those 100k miles spark plugs long dead???? ever do tuneups, ever?
if runs 3 sec, and sound great. then you lost fueling.
i check for flooding only if spark is good.
if you get here, the story can go long play, as fueling is complex.
( no injections, leaking , clogged, ECU inputs all wrong, fuel pump dead or weak, FPreg fubar. long..... ask.)
Posted on Jan 23, 2014
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Posted on Jan 02, 2017
it most definately is the crank shaft sensor. same exact prob i had. it costs about 60 bucks and 3 minutes to replace yourself. one bolt holds it into the transmission bell housing and one connector wire. very simple fix. call off the wrecker. just have plenty of ratchet extensions available i had to go in from behind the transfer case to reach the bolt but it was still pretty simple to install.
Posted on Jan 29, 2009
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