Rough idle gas fumes from tail pipe 1993 jimmy s-15 vortec

[BlazerLT]

Sounds like his fuel line kit going to the CPI injector is shot.

[djcarter]

Originally Posted by burninjimmy

yes what they're saying cpi is bad i just went through cpi hell and running stronger than ever
480 sounds steep i got mine through consumer auto parts reman for 175.00 gasket was only 7.00
did it in only 30 minutes runs like a champ!

hi, well i had the cpi replaced new part i paid 275.00 for . now it acts like it wants to stall and almost every time i stop it quits runnning stalls or it wants to move by itself .. like a race car ..like it pushes me while my foot is on brake..what can that be? help donna

[BlazerLT]

Ah, that is your EGR being clogged with carbon.

Buy a new EGR gasket, remove the valve, remove the carbon chunks in it, spray it thoroughly with TB cleaner and reinstall with the new gasket.

Then reset the computer by pulling the negative battery terminal for 5 minutes and you are good.

[djcarter]

thanks ,, ill try that this week and see if it helps i also was told it might be the throttle sensor .. donnA

[BlazerLT]

It just happened to mine 3 months ago.

If it won't idle when you are decellerating but runs perfectly when you are accelerating, chance are that it is the EGR valve.

BTW, don't drive it like this anymore, get it fixed ASAP.

It will foul your plugs up very badly if you let this go any longer.

[djcarter]

hi i was told my a garage to program drive cycle after installing a cpi unit .. it that true and how do you do that ? im not sure the guy who put part in did that.. how can i tell? donna

[rlith]

When you pulled the upper plenum to change your CPI unit, did you note if anything was washed (one side cleaner than the other). Did you note if the driver's side was washed? One of the problems may be that you should also change your nut kit (inbound/outbound fuel lines inside the intake) It's very possible when you changed the CPI you cracked those lines. Over time they become very brittle and pulling them from the CPI unit can do that. Pull the plenum again. Check for that. (nut kit is about $45.00 at the dealer).

You are dumping way too much fuel. This can also cause your Cat converter to clog up. So watch for that. Have your ignition module checked as well. It may be causing misfires. And make sure the small vac hose is attached on the back of the plenum. This will affect your idle. Pull that plenum!!!!!

[americansk8er85]

where is consumer auto parts, is that online? cause i need the same part and 480 is really steep. thanx

[rlith]

Just get it at advance autoparts...

[mjohn]

The best prices I found were at www.rockauto.com
And they have quick delivery...

[mjohn]

I think I paid $275. or so...to my door...

And, I am very Thankful for this forum and all the experts on this repair...now my Jimmy runs great and gets approximately 20mpg...

[BlazerLT]

Originally Posted by mjohn

I think I paid $275. or so...to my door...

And, I am very Thankful for this forum and all the experts on this repair...now my Jimmy runs great and gets approximately 20mpg...

Sounds about right.

Good fuel economy. With O2 sensor replacement I did 5 months ago, I was pulling in 24mpg on the highway straight 60mph.

[mjohn]

BlazerLT
Hows the temp in Canada today?
Cold here in Minnesota...

[BlazerLT]

Actually, it is rather warm. 30f which is too warm for this time of year, the roads are grimy and slushy.

Makes for a really filthy truck.

You are under a artic outflow jet which is affecting North America right now and freezing you guys rather nicely.

It will get here to Ontario soon.....it always does.