Misfire and no power....

[Kraig]

Also, I just went back and read through and noticed you asked about checking exhaust port temps with the engine warmed up or no. If the engine is warmed up, the manifold can heat soak. You want to check it cold. Each port should heat up at about the same rate. If you have one that doesn’t get warm until the engine is warmed up and heat has soaked into the manifold, that could be a sign.

 

[sgosa]

Also, I just went back and read through and noticed you asked about checking exhaust port temps with the engine warmed up or no. If the engine is warmed up, the manifold can heat soak. You want to check it cold. Each port should heat up at about the same rate. If you have one that doesn’t get warm until the engine is warmed up and heat has soaked into the manifold, that could be a sign.

I’ll recheck them. I was wondering if the heat soak would be an issue.

 

[sgosa]

Cold cyl temps
Driver side rear 96
2nd from rear 115
3rd from rear 158
Front 128

Passenger side
Rear 106
2nd from rear 128
3rd from rear 108
Front 138

 

[Scottydoggs]

pass side, front to back, 2,4,6,8

driver side, front to back, 1,3,5,7

thats how the cylinders are numbered. just so we can talk with no confusion.

#8 seems pretty cold. you just getting multiple misfire code? po300, or you getting cylinder codes too?

could also be a bad injector not giving that cylinder any fuel.

 

[Tonyrodz]

yes, or bad coil pack, try swapping coil packs around see if you get the same or different results, I know you said you checked them but wouldn't hurt to confirm, you can get the "herko" injectors off of ebay very very reasonable, they are essentially oem I believe they are made in the same plant I have bought a couple complete sets and had excellent results, just get the ones with 4 nozzles as those are the flex fuel ones.

**you may want to check the voltage on the harness connector to the suspect injectors as well to verify they are getting power

How much are those injectors? Have a link?

 

[sgosa]

I think I saw 1A Auto had a full set for $160 or so.

 

[sgosa]

pass side, front to back, 2,4,6,8

driver side, front to back, 1,3,5,7

thats how the cylinders are numbered. just so we can talk with no confusion.

#8 seems pretty cold. you just getting multiple misfire code? po300, or you getting cylinder codes too?

could also be a bad injector not giving that cylinder any fuel.

Just random misfire code. And was getting the mass air flow sensor code. Replaced it, now just the P0300.

 

[sgosa]

Another newbie question. If it turns out to be the cats are clogged. Can I do dual exhaust and eliminate the Cats altogether? Or is this newer stuff not suitable for that?

 

[Scottydoggs]

you will likely need to tune the cat code out if you delete the cats. that means a tuned pcm.

 

[sgosa]

I threw in the towel today guys, and took it to a local shop. Hopefully I might hear something tomorrow. Thanks for all the info!