Engine cranks has fuel and spark but won't start

[Plumbnutz]

I recently took my 89 K5 Blazer out for some wheelin' on the way home the engine started to misfire. I suspected the distributor had gotten wet, sure enough moisture was in the distributor. I dried out the distributor cap, cleaned the contacts and put back together. At first I thought I had re-wired the spark plug wires incorrectly, so I checked it more than once and even referenced another vehicle to make sure I was right, still nothing.

I checked for spark at the plugs and have spark. I checked voltage at the distributor and have fuel at the throttle body. I have not checked fuel pressure though. I also loosen the distributor and tried different positions, no go. Even changed out the distributor and rotor from a TBI 350 that was running.

What the heck gives? I have fuel, spark and the engine cranks but it will not fire, it does make a popping sound the first time I try to start it. At first I thought maybe whoever owned it before me had the distributor off 180 degrees and changed the spark plugs wires at the distributor accordingly, nothing.

Any suggestions would be greatly appreciated.

[tvblazer78]

How many Miles do you have on it? if you have allot check the timing chain and then compression test it.

I would do that first..

Originally Posted by Plumbnutz

I recently took my 89 K5 Blazer out for some wheelin' on the way home the engine started to misfire. I suspected the distributor had gotten wet, sure enough moisture was in the distributor. I dried out the distributor cap, cleaned the contacts and put back together. At first I thought I had re-wired the spark plug wires incorrectly, so I checked it more than once and even referenced another vehicle to make sure I was right, still nothing.

I checked for spark at the plugs and have spark. I checked voltage at the distributor and have fuel at the throttle body. I have not checked fuel pressure though. I also loosen the distributor and tried different positions, no go. Even changed out the distributor and rotor from a TBI 350 that was running.

What the heck gives? I have fuel, spark and the engine cranks but it will not fire, it does make a popping sound the first time I try to start it. At first I thought maybe whoever owned it before me had the distributor off 180 degrees and changed the spark plugs wires at the distributor accordingly, nothing.

Any suggestions would be greatly appreciated.

[mhicks]

Pull the cap off and see if the distributor is turning......

[DSLBURB84]

I have had a problem in the past with the wires that ground to the thermostat housing, sometimes those wires will get loose in their connector and someitmes the connector will just break. Bizarre place to have a problem.