Hey guys


So my blazer shut down randomly yesterday while driving, Just turned a corner and it died, no stutter no chug no nothing just died, I tried restarting it but it won't start, turns over fine and I hear the fuel pump charge but nothing. Already replaced the ignition lock cylinder and switch nothing changed.

Any Ideas what it might be?

 

Do you have spark?.

 

Check the underhood fuses, ecm1 and ecm2. What year truck?

 

Also have a 1999 one as well.

Have switched one at a time, the Crankshaft sensor, ignition coil, Ignition control module, checked the fuses ECM 1 and ECM 2 first off.

Also checked to make sure we were getting fuel to the spider on the key turn prime.

Doesn't seem to be getting any spark. Going to run and get a spark tester and test that we have spark at the coil and then maybe look at cap and rotor.

Any other suggestions appreciated.

 

Does the vehicle have a remote start or alarm system on it?

Do you have battery voltage on the pink wire at the crankshaft position sensor with the ignition in the RUN position?

 

Take distributor cap off and verify that the rotor is rotating when cranking the engine....just to be sure timing chain did not break. Check condition of rotor and cap contacts.

 

Lanny, spark pulse is generated at the CKP sensor. Even if the timing chain is broken there would still be spark

 

Yep...there would be spark....but would only be to one possibly two cylinders if the timing chain broke...right? Or if the rotor or distributor cap contacts were really corroided then might only get spark to a few cylinders.

 

In post #4, the OP mentioned testing for spark at the coil. I should have added "at the coil" to the end of post #7 to clarify, sorry.

 

Hey guys sorry I haven't responded in a couple of day been crazy around here

Anyway what looks like happened is the harmonic balancer outer ring thing came off cracked the timing chain cover and busted the crankshaft sensor in the process.

Already did a cheap fix and put on a new cover and sensor, but of course I tried to leave the oil pan on, but alas it runs now but leaks oil like a sieve

I guess I'll start looking into pulling the engine.

Thanks again for the help