does this make sense?

[Redog]

OK my car's been missing but only above 2000 RPMs

Currently I have a totally stock upper intake on a P&P lower, it was a temp thing until I got my new upper P&P (not like I was going to get the old P&P one back that I had, long story)

Anyway only above 2000 RPM's is misses and stumbles, below that, no problem.

I replaced the coil packs and ICM (i had the parts already) and the wires are fairly new. I just replaced the plugs the other day, except for #2, I think it's cross threaded, it will not budge.

I read on a car fourm that a guy had a simialr problem with a Sentra where the shop left a rag in the airbox and it was choking airflow above 2000. Could my stock upper be doing this? I would think the PCM would correct for this

[Afugy]

Better check that #2 spark plug. I'm guessing its not throwing a code?

Starting to sound more like when my head gasket blew. Puking coolant and miss firing, next will be some white smoke.

[Nate's Alero]

gee.. deja vu?
heads dude.. tellin you.

[clutch1]

Another HUGE player.. do you have fuel pressure and volume?!?!? Get a fuel gauge.. should be 41-47 psi when it primes. Then, run it. Get a fuel gauge that lets you divert fuel, and with the car running, press the button and divert fuel into a graduated container (paint mixing cup is perfect). Let it flow for 15 seconds, and you *should* get 12-15 oz of volume. Any lower than that and you have fuel delivery issues.

How are the injectors? They might provide enough at idle, but not 2000rpm. A telltale would be fuel trim numbers... rev it up and look at the STFT, if it increased fuel delivery quite a bit, and you have pressure and volume from the pump, the injectors may be dirty.

Also, as long as you have a scanner hooked up, look at the misfire graphic, which shows misfire on all 6 cyls. Rev it over 2000 and see if it's all cyls causing an issue or just #2.

Good luck.

[Redog]

Yeah no codes.

I was thinking fuel pressure also.

The coolant issue has been fixed ;) I haven't lost any in 2 weeks now. It was the way the cap was sealed or lack there of. Still at the "FULL COLD" level, when car is cold :D

It hasn't been missing too much and runs a lot better now with the 5 new plugs, ICM and coil packs, but when it misses it will pop out of the tail pipe

[Redog]

No SES light but I scaned it today anyway.

Came back with a P0336 code CPS circuit, range or performance problem

Now would that be the 7x or the 24x? I'm thinking the 24x and there is a relearn that has to be done?!?!? How do you do that?

[clutch1]

Ehhh, doesn't help much just guessing, lol.
Nows the time to check the pattern each sensor is putting out.. 24x should be nice boxes (digital pattern), and the 7x should be a good analog pattern http://www.socob.bb/tuning%20stuff/Edward/MY00%20EJ204%20Crank%20Sensor%20waveform.png



The relearn is easy.. make it hit the rev limiter 4 times. Then it's relearned.

[Redog]

^^ Oh that is an easy relearn :lol:

My mech is going to replace it. I do not have the tools for this :(

[clutch1]

All ya need is a pulley puller.. sound like a good excuse to get one ;)

[Redog]

I have no where to do that kind of work on the car right now. Besides I'll just do th loaner program at Advanced.

I took it to the mech today simply because I didn't know which sensor to check, well he found out which sensor it was. It was def the 24x.

The FFP crank pulley I have is bent :eek: and when it was bent, it took out part of that sensor. I mean litterlly took out a part of the sensor and it was jammed in the crank pulley.

My mech tried to bend it back, but now the car's missing worse, much worse. It threw a code today and it came back P0336.

I found my stock pulley, he's going to swap it for me (I need it fixed now and I don't have the time) but he's not charging me for it.

If the stock pulley makes it better, I might get that one on Mr Z's website since Ben doesn't have any on his, but that won't be for a while. Funds are getting tight :(

[clutch1]

Ah yes tight tolerances on that guy, good thing it's been figured out.

[Redog]

It's been a few days now and Redog is running great!!!!

HA HA 1/2 way down with the pedal spins the wheels and some wheel hop :lol: