Hi new to site, driving my s 10 with 2.2 Monday and cannot run over 50 mph. Number 1 and 4 has no spark. I replaced coil and still same problem. Compression is good. I can smell gas probably from cyl not firing. Any one had same issue in the pass? Any help greatly appreciated

 

How do you know that two cylinders have no spark?

Do you have any codes?

Have you changed anything recently?

George

 

As its running I pulled plug wires and no engine change or spark out of 1 and 4 . If I pull 2 truck dies and if 3 is pulled engine changes. I've changed coil packs,wires and plug.

 

When I had coil packs out. I turned key on to see if I get power to leads to coil. I get on both

 

That tells you that those cylinders are not contributing. You do not know why yet. It can be spark, compression or fuel. On the cylinders that show no change in rpm when the plug wire is pulled, check and see if there is spark at the plug. On a cylinder that does show an rpm reduction, check and see if you have 1" of strong blue spark.

Have you done a compression test?

George

 

No spark at 1 and 4 has did compression test and all cyl read 150

 

Is there a circuit or fuseable link that 1 and 4 ties into? I did replace coil but no change

 

I did hook a scan tool but no codes or check engine light

 

Do you have 1" of strong blue spark at the plugs of the functioning cylinders?

George

 

Also if you swap coil packs do the functioning cylinders change?

George