S-10 no start?

[kh440]

Dealing with 95 S-10 4-cyl (2.2) with a no start condition. Have not searched for codes yet, but here's the kicker: disconnect the battery, reset the ecm and it will eventually fire. Any ideas where I need to start looking first (ecm, crank sens, etc?) before I freeze my tail off troubleshooting?

 

[TexasT]

Are you getting any spark?

Is the fuel pump putting out any thing?

We will assume that he compression is good(You didn't do anything crazy to loose compression did you?)

 

[kh440]

Well, when I went out to fool with it Fri night the dam thing fired off every time, so I can't answer that-the part that is throwing me is the bit about disconnecting the battery for a minute or two, reconnecting it and it would start. There are no codes stored in it I can tell you that much.

 

[Steve V]

Maybe the crank sensor,theres also a small harness that goes from the crank sensor to the module/coil they are known for going bad. When you get it to no start wiggle it and see if it fires. It's about $20 at the dealer.

 

[seeyabye]

Wrecker will be there Monday morning. We were shorthanded for the weekend, back to full staff Monday.

 

[kh440]

That actually makes sense, especially given how random this problem seems to be. I'll throw $20 at it on a hunch, then if that doesn't work then it's time to turn it over to the pros. I'm guessing this sensor is in the front cover somewhere adjacent to the balancer?

 

[Steve V]

Sensor is on the right side of the block,kind of in the middle. Look for the module/coil and follow the wires to the crank sensor.

 

[GNTIM]

My guess is the ECM. I have never seen a sensor cause that kind of problem, but I have seen GM computers do really wierd stuff. My 02.

 

[kh440]

I've considered the ecm, but wouldn't there be a code or two stored, even if those codes turn out to be bogus?

 

[GNTIM]

No, most of the computers I've replaced did not set a code. Some would not start below a certain temp, would die if they hit a hard bump, stall when the A/C was turned on...ect

 

[SloGN]

does this truck have a anti-theft device pass key ? if so by disconnecting the battery could have reset it?

 

[klrv6]

I think that model eats headgaskets. Just make sure it's not leaking into the cylinders and covering the plugs.

 

[kh440]

I think that model eats headgaskets. Just make sure it's not leaking into the cylinders and covering the plugs.

You're right, they have been known to blow headgaskets. I may get a wild hair and run a compression check just for hoots and giggles, but I'm 98% convinced it's an electrical gremlin, at least this time....