Running crappie

[bmktrexpro]

Plugs are new, so are the wires, coil pack original, air filter old.

[bmktrexpro]

Disconnected the o2, still runs crappie. I should of said that I gutted the cat instaed of put a new one on. Sorry. I don't think that should of affected it, cause I thinkthat I read somewhere on this sit that somebody else gutted there cat and it still ran ok? Anyway, I'm trying to get the car straightened out so that I can sell it.

[no1kicker]

I would think it would run ok without the cat since there is no O2 behind it, and the turbo provides enough back pressure.

[bmktrexpro]

So I can eliminate the xover being the problem? Have any suggestions on what to check next? Or should I take to shop and have them put computer on it and road test it?

[maximage]

Check for leaky injectors.

[RareGMFan]

So I can eliminate the xover being the problem?

There's only one way to elimate the crossover.  Get a new one from Jeff M.  What you're describing could very well be a crossover leak.  It will cause the o2 sensor to read incorrectly/inaccurately.  My TSTE is doing the same thing where there is a band of sluggish power, then suddenly BOOM - rocketship, then won't move again.  All of this happening in a split second.  It's gotten worse and worse to the point that I can't really drive it right now.  I'm sure there's other contributing factors, but untill I get the crossover fixed, I'm holding off on the tune-up/upgrades, and even a new 02 sensor.  Of course, my problem might be the computer itself since not a single code has been triggered in spite of its horrible running state.

[bmktrexpro]

Ok, I was hopeing to eliminate the xover cause I really don't want to put that much more money into the car, cause like I said I want to sell it.

[jheiv]

did you ever check your FPR... i just changed my fuel rail and fpr assembly and it fixed alot of my bogging down / stalling / flooding problems.

[maddux31]

Stock crossover is the single most problem causing part on the vehicle.  I can understand the reasoning (financial) behind not replacing it but as a two time purchaser of this item (as well as two o2 sensors) from Jeff M., I must say that you will never know what these cars are supposed to run like without this fix.  One thing that I don't see mentioned about the stock crossover/fouled o2 sensor is the fact that running rich for a long period of time will thin your oil out and reduce the lubricating qualities (not much to begin with any more thanks to the EPA) of your oil.  That extra fuel in the combustion chambers over the long haul is going to mix with your oil if your rings/cylinder walls are not absolutely perfect.   This has been explained to me by Jeff M. and at least 3 other engine builders in the past.  Well you probably didn't need to hear all that so I'll shut up.

[bmktrexpro]

Well, I guess I'll get with my mechanic and cut the heat sheild off and check the xover out and go from there. Thanks for everybodys input, highly appreciated. Will keep in touch with progress.

[bmktrexpro]

Well, xover in excellent shape almost brand new, no rust or cracks anywere. Found two bolts that were missing off turbo were it mounts to xover and the flex tube that runs from the xover to the egr valve hand tight. Haven't put things back together. Found oil in throtle body? Any possibility that the egr valve is bad? Any other suggestions on what to try next?

[bmktrexpro]

Ok, here's the situation. I'm tired of fooling with this car and tired of looking at it in my driveway. Anybody interested in buying it for $1500 OBO?

[4PASNU]

Where are you located?  Any way you could post some pictures or send them to me at mtruck@earthlink.net?