Trouble with cammed lt1
On The Tree
Joined: Feb 2008
Posts: 146
Likes: 0
Alright the specs are in my sig. First time the car started with the new motor and tune, it ran pretty good, see sig for idle/rev clip. It's got a pcm for less tune on it that I think is the problem, but now what it does is load up and foul the plugs out, I have to take all 8 out, clean em, re install, and the car will start right up, but sooner or later, the same thing happens, runs rich and dies... Car is still open headers, but everything else is finished on the car, just want to drive it. I noticed that the air filter on my CAI was pretty dirty, but I haven't had the chance to clean the plugs again and try it without that filter..
And for what its worth, the car went through a foot puddle in July with the stock motor, but this is the same maf and filter that got soaked, car hydro locked and snapped a stock rod..
And for what its worth, the car went through a foot puddle in July with the stock motor, but this is the same maf and filter that got soaked, car hydro locked and snapped a stock rod..
How well does it run before she stalls out? If your O2s are fairly new and the car ran good before, I would get a scanner and see if the Coolant Temp Sensor is reading correctly. If it reads a minus anything, it dumps fuel and can cause plugs to foul very quickly. The computer thinks the motor needs the extra gas to start and run if the reading is a minus. It's the sensor that screws into the waterpump, the one on the side of the head is for your gauge.
You might already know all that but I figured I'd throw out a different opinion. I had a PCMfor less tune when I had the Hotcam kit and it was very rich. Pulled the plugs to verify it was rich.
You might already know all that but I figured I'd throw out a different opinion. I had a PCMfor less tune when I had the Hotcam kit and it was very rich. Pulled the plugs to verify it was rich.
12 Second Club
Joined: Jun 2005
Posts: 509
Likes: 0
From: Warner Robins Ga
It doesn't have to be running, just turned to the run position. Then look in the datastream and look at the Coolant Temp Sensor readings. It should be within a couple of degrees of the outside temp or garage temp, if it reads in the - then it's bad. I haven't used Snap-On Modus since my last job(2.5yrs), we use Genysis at my current job. I can't remember if the Modus has datastream, I'm pretty sure it does.
If the CTS checks out ok, since you already have the scanner hooked up you can look at the rest of the data.
If the CTS checks out ok, since you already have the scanner hooked up you can look at the rest of the data.
Does anyone else have any idea why the car would be giving me this trouble, besides whats been listed so far; Open headers causing mixxed up 02 readings, and the Coolant Temp Sensor reading negitive? I can use the Modus to check the 02's to make sure their working can't I?
Alright, engine temp sensor is working, and heres the codes I pulled
p0100
p0336
p0500
p1351
p1533
p1652
And the bank 1 sensor is reading 104mv with the car off, where's the bank 2 is reading 425mv... cars off with open headers again...
Any ideas why shes running so pig rich? Could it be the MAF? I know I have the code for the maf, p0100 but isn't that just effect closed loop?
p0100
p0336
p0500
p1351
p1533
p1652
And the bank 1 sensor is reading 104mv with the car off, where's the bank 2 is reading 425mv... cars off with open headers again...
Any ideas why shes running so pig rich? Could it be the MAF? I know I have the code for the maf, p0100 but isn't that just effect closed loop?
Alright started car today with modus hooked up, and the car ran beautifully for about a min or so, until the coolant temp was about 150 degrees, the bank one o2 stayed steady at ~4-9mv's the whole time, so I'm guessing that's bad, but still, it never tried to go into closed loop, so that shouldn't matter...
Im gonna check fuel pressure friday when I get some time next, see if I kinked the return line or the FPR is fudged up.... Im really at a loss at this time..
Does the MAF do anything in open loop?
Im gonna check fuel pressure friday when I get some time next, see if I kinked the return line or the FPR is fudged up.... Im really at a loss at this time..
Does the MAF do anything in open loop?
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Eng Sen Fuse was blown, replaced it and the car started right up and ran great, best it has, and once it got to 170 degrees it just shut off, I read the codes again and came up with a crank shaft positioning sensor code, gonna replace that tomorrow and see what that does... Other than that I have a bum driverside 02 sensor... I'll keep it updated.
