Topic: Check engine flashing and running rough

[dexetr30]

I swapped only the injector. I kept the plug in the original position, where it's supposed to be. The reason I did that was to see if the injector code changed. It did. It went from p0201 to p0202. So, that leads me to believe that it's the injector and not the plug. I'll pull each plug one by one in the morning to see what happens.

Thanks.  

[dexetr30]

Still, I'm left scratching my head in regards to the CPS code. The Jeep runs, albeit poorly. Every time I've had a bad CPS, the Jeep wouldn't run.

[neale_rs]

My Neon has had crankshaft codes twice and still ran just fine. Also, the second time it happened, the actual problem was the CAMSHAFT sensor (which is known to go bad on Neons pretty often).  The mechanic tried both and it turned out to be the cam sensor, he was nice enough to charge only for the one that solved the problem.

[dexetr30]

I put a new injector in the # 2 position and fired it up. Still missing/running lumpy. So I took it for roughly a 2 mile ride and then pulled it back into my shop. Shut it off and checked the codes. P0204. So, the injector problem has moved from position #2 to position #4. I had a SEVERE overheating incident that lead to me changing the head, exhaust manifold and radiator about a week and a half ago. I'm wondering, since the injectors sit so close to the exhaust manifold, could excessive heat damaged the injectors?

[dexetr30]

Also, the CPS code P0320 has now disappeared.

[Jeffy]

Might as well replace all of the injectors.

[dexetr30]

I just got back from NAPA. They had one left in stock and the remaining two will be available for pick-up first thing in the a.m. tomorrow. Hopefully this will be the end of my troubles for a while. Thanks to everyone who has responded so far.

[sharpxmen]

i doubt the heat from the head damaged the injectors but stranger things have happened (i mean it would have had to be quite the temp to make a difference i think).

since you just worked on the motor, would it be possible that you have a bad connection or even bad ground somewhere?

[dexetr30]

i doubt the heat from the head damaged the injectors but stranger things have happened (i mean it would have had to be quite the temp to make a difference i think).

since you just worked on the motor, would it be possible that you have a bad connection or even bad ground somewhere?

Could be. I'm going to go over everything very thoroughly today and re-check everything. Still, new injectors aren't a bad idea at 162K.

[dexetr30]

May not be so visible in the photo but, bent intake valve on cylinder # 4. This is a brand new cylinder head!!! It barely has 200 miles on it!!! There’s no mark on the piston so I am very unsure of what may have cause this. Also, the pushrod is as straight as can be. WTF??? Bad valve?

[sharpxmen]

was the head changed after it overheated? or did it get an valve job and a flat face?
take the valve out and check the stem, if its scratched then it seized and got a tap from the piston (doesnt take much and i understand its not marked but unless it was bad to begin with it won't bend on it's own).

or better if you got it done at a shop might as well take it over there and see what they say.

[dexetr30]

was the head changed after it overheated? or did it get an valve job and a flat face?
take the valve out and check the stem, if its scratched then it seized and got a tap from the piston (doesnt take much and i understand its not marked but unless it was bad to begin with it won't bend on it's own).

or better if you got it done at a shop might as well take it over there and see what they say.

The head was changed after the overheat. Turned the old head in as a core. I'm taking it back to the shop today.

[dexetr30]

Took it back to the shop and it's being taken care of. The push-rods are all straight and I see no excessive wear on the tips. I'm wondering if I should replace the lifters and push-rods while I have everything torn apart. What's everyone's opinion on this?

[dexetr30]

BTW, the valve face it bent in a concave pattern. Looks as though something pulled to hard on the stem from the spring side. Has anyone seen this before? What could cause it?

[sharpxmen]

is it "burned" on the seat (if it didn close then could have overheated the valve and it deformed) - the exhaust valves are lot harder than the intake ones.