The Official Hot Rod Thread - Part 2: No Replacement For Displacement

[DragonGunner]

Put a Speedlogix hood on Challenger and drilled the hood pin holes and will go to paint next week. Man looks like a different car especially from inside, think it gives it a better look…..may wrap scoop later in flat black.

 

[churchmouse]

Misfire cyl #4. Time for plugs and probably coils & boots.

Our van gets a CEL at interstate speeds. OK in town. Have the ECU scanned. Intermittent random high speed misfire. No cause given. It is undetectable from the pilots chair. Engine smooth as silk. New plugs/wires and no change. I am doing the cam position sensor this spring. If that does not do it the the crank sensor.

 

[Bigtanker]

Our van gets a CEL at interstate speeds. OK in town. Have the ECU scanned. Intermittent random high speed misfire. No cause given. It is undetectable from the pilots chair. Engine smooth as silk. New plugs/wires and no change. I am doing the cam position sensor this spring. If that does not do it the the crank sensor.

I've had the truck for 25k. It has 180k on it. I have never done the plugs. I was planning on doing them this spring anyway.

 

[thunderchicken]

Misfire cyl #4. Time for plugs and probably coils & boots.

What kind of truck? Usually there's no reason to replace coils unless one gets too weak. These coil on plug set ups can go 200k+ miles without ever needing a coil in many cases

 

[thunderchicken]

Our van gets a CEL at interstate speeds. OK in town. Have the ECU scanned. Intermittent random high speed misfire. No cause given. It is undetectable from the pilots chair. Engine smooth as silk. New plugs/wires and no change. I am doing the cam position sensor this spring. If that does not do it the the crank sensor.

I would check for corrosion on any ECU contacts. Then I would be curious about an injector getting hot and breaking down.
Not that it can't happen but crank /cam sensors rarely cause a misfire concern. Might check before you replace those as sometimes it requires a re-learn process to reset the crank/cam position correlation.

 

[churchmouse]

I would check for corrosion on any ECU contacts. Then I would be curious about an injector getting hot and breaking down.
Not that it can't happen but crank /cam sensors rarely cause a misfire concern. Might check before you replace those as sometimes it requires a re-learn process to reset the crank/cam position correlation.

My guy that tested it and I discussed this but it is not just 1 cylinder. It is random. Meaning it jumps around when the engine is turning steady highway RPMs. That is the only time it happens and it is not a dead miss. You can not feel anything when the light comes on.
He pulls history on his bench model Snap On scanner and it only states random high speed miss-fire. No cylinder specific. That is what leads me to think it could be one of the position sensors.
And it does not do it all the time.....

 

[Brad69]

Dragon Gunner

I say wrap the entire hood in black!
View attachment 65033

 

[Bigtanker]

What kind of truck? Usually there's no reason to replace coils unless one gets too weak. These coil on plug set ups can go 200k+ miles without ever needing a coil in many cases

03 Dodge 4.7l.

 

[ChristianPatriot]

Cross another item off of my list of things I’ve never done. Pulled the engine and trans out of the Ventura today with the help of Rusty. Went really smoothly, other than my driveway looking like a triple homicide from the ATF. It happens.

I had gotten most of it disconnected ahead of time so we weren’t here all night.


Cheapo Harbour Freight engine hoist ftw!!


Looks naked. Gonna be all kinds of fun with a new power plant.

 

[ChristianPatriot]

Anybody need a BOP Turbo 350 trans?

 

[long coat]

My guy that tested it and I discussed this but it is not just 1 cylinder. It is random. Meaning it jumps around when the engine is turning steady highway RPMs. That is the only time it happens and it is not a dead miss. You can not feel anything when the light comes on.
He pulls history on his bench model Snap On scanner and it only states random high speed miss-fire. No cylinder specific. That is what leads me to think it could be one of the position sensors.
And it does not do it all the time.....

If it's a Chevy van with a LS.

Before you put any more $ in it, have someone do a crank relearn with a scanner (it will take a full scanner, not just a reader). It's a know problem with the LS engine.

 

[churchmouse]

If it's a Chevy van with a LS.

Before you put any more $ in it, have someone do a crank relearn with a scanner (it will take a full scanner, not just a reader). It's a know problem with the LS engine.

Yes. It is the 6.0
Thanks. I happen to know a guy...

 

[long coat]

Yes. It is the 6.0
Thanks. I happen to know a guy...

If you don't mind, ask him what he will charge to do mine also. 2003 6.0 & I get the same light sometimes.

 

[churchmouse]

If you don't mind, ask him what he will charge to do mine also. 2003 6.0 & I get the same light sometimes.

It is an ingo member. Are you still in B-burg...???

 

[long coat]

Yes, I can even come to him/her.

 

[churchmouse]

Yes, I can even come to him/her.

He just replied to my PM. Not his scanner. Guy he worked with and he retired.



Let me try another source.

 

[RustyHornet]

So I managed to find some poor bastard who let me steal the engine outta his car, and he was excited about it...

 

[churchmouse]

So I managed to find some poor bastard who let me steal the engine outta his car, and he was excited about it...

Go figure....

 

[ChristianPatriot]

So I managed to find some poor bastard who let me steal the engine outta his car, and he was excited about it...

It’s all about the experience

 

[RustyHornet]

It’s all about the experience

Yes it is. I can honestly say I’ve never managed to get ATF all over the ground. Coolant yes. ATF no.... So yes it was an experience!