Car will not stay running..

ProCharger GT

Member

Jun 3, 2004

153

0

16

Cleveland

Dec 24, 2006

#1

• Dec 24, 2006

• #1

Here's the deal..

A little while back, I was driving my car around - it made some popping noises, I was able to drive it home - once there, turned it off. Turned it back on in the morning, it would idle rough around 500 RPM's and die. I have already done the following:

1) Checked the supercharger, it has oil, not making any weird noises - no belt slip.
2) Checked every sensor, everything is clean
3) Alternator was dead, replaced that and the battery
4) Ran it w/o the MAF, same issue
5) Bypassed the supercharger completely, still doing the same thing

I can't find any vaccuum leaks, I'm not leaking any fluids, and the only thing I can think of is that it's not getting enough fuel...after all the starting and stopping, with 60# injectors, there should be SOME fuel smell - but there isn't anything. Aside from the fuel filter, anyone else have ideas? Pumps/BAP/injectors are all brand new and have less than 500 miles on them.

 

DTNODYA

Member

Dec 15, 2005

831

1

16

Dec 24, 2006

#2

• Dec 24, 2006

• #2

IAC? Reset your computer? Just throwing stuff out there .... Fuel pump?

 

DropTopPony

Noob Slayer

Founding Member

Aug 13, 2002

2,570

3

48

south jersey

Dec 24, 2006

#3

• Dec 24, 2006

• #3

Sounds like an IAC to me...cheap and easy to replace.

 

ADRENLN

Active Member

Apr 16, 2003

2,342

3

49

NJ

Dec 24, 2006

#4

• Dec 24, 2006

• #4

what fuel pump are you running? it was fine before with the same tune right?

 

03ghoststang

Well-Known Member

Jul 16, 2005

1,930

1

57

Los Angeles, California

Dec 24, 2006

#5

• Dec 24, 2006

• #5

what about the plugs have you checked those but it could also be the IAC

 

ProCharger GT

Member

Jun 3, 2004

153

0

16

Cleveland

Dec 24, 2006

#6

• Dec 24, 2006

• #6

I was thinking the IAC, but it was just put back on there when the P-51 went on last year...the fuel pumps are the 03/04 Cobra tank/pumps, brand new. The only "old" thing on there is the fuel filter...it's just weird that it made the popping noises prior to this happening. It really sounded like a vaccuum line popped off when it happened....but everything's all hooked up. Plugs have about 300 miles on them, nothing too crazy..

 

AmBo

Active Member

Feb 3, 2004

1,027

1

36

New Jersey

Dec 24, 2006

#7

• Dec 24, 2006

• #7

492rwhp on a stock block?

 

ProCharger GT

Member

Jun 3, 2004

153

0

16

Cleveland

Dec 25, 2006

#8

• Dec 25, 2006

• #8

No, check my garage for mods..

 

the98stang

Active Member

Aug 12, 2005

2,408

0

47

Clovis, CA

Dec 25, 2006

#9

• Dec 25, 2006

• #9

Popping from the exhaust could mean timing/tuning issues. Who tuned the car? I don't think it's getting enough fuel like you said...

 

stangman

15 Year Member

Jul 10, 2003

2,690

10

69

in a 3 bed, 2 bath

Dec 25, 2006

#10

• Dec 25, 2006

• #10

ProCharger GT said:

I was thinking the IAC, but it was just put back on there when the P-51 went on last year...the fuel pumps are the 03/04 Cobra tank/pumps, brand new. The only "old" thing on there is the fuel filter...it's just weird that it made the popping noises prior to this happening. It really sounded like a vaccuum line popped off when it happened....but everything's all hooked up. Plugs have about 300 miles on them, nothing too crazy..

Click to expand...

but have you checked the plugs for any damage? if you haven't you need to before you do anything else

 

ProCharger GT

Member

Jun 3, 2004

153

0

16

Cleveland

Dec 25, 2006

#11

• Dec 25, 2006

• #11

Haven't checked the plugs...and actually, I didn't even bring the car into boost, so I really doubt that unless there was mechanical damage, the plugs would be ok - but I'll double check them.

I'm really leaning to the fuel route, after starting it up a few times in a row, you'd smell gas, especially from that setup. I don't smell anything at all.

 

the98stang

Active Member

Aug 12, 2005

2,408

0

47

Clovis, CA

Dec 25, 2006

#12

• Dec 25, 2006

• #12

ProCharger GT said:

I'm really leaning to the fuel route, after starting it up a few times in a row, you'd smell gas, especially from that setup. I don't smell anything at all.

Click to expand...

Check the AFR. If your smelling gas, it's running rich, or you have a leak somewhere.

 

ProCharger GT

Member

Jun 3, 2004

153

0

16

Cleveland

Dec 25, 2006

#13

• Dec 25, 2006

• #13

That's the problem, I'm not smelling any gas

 

the98stang

Active Member

Aug 12, 2005

2,408

0

47

Clovis, CA

Dec 25, 2006

#14

• Dec 25, 2006

• #14

ProCharger GT said:

That's the problem, I'm not smelling any gas

Click to expand...

You wouldn't smell gas if it was running lean....

 

ProCharger GT

Member

Jun 3, 2004

153

0

16

Cleveland

Dec 25, 2006

#15

• Dec 25, 2006

• #15

Right, and the tune is all dialed in, so I highly doubt it's that. That's why I'm leaning to fuel filter - if it's clogged, it might be getting just enough to turn over, and thats it. Couldn't hurt changing...I'll be putting that on my list of things to try. If that doesn't do it, then I'll look to injectors/ignition. It's just so weird that the popping noise is what caused this issue in the first place...I wasn't even driving the thing hard, I'm talking < 3000 RPM's when I heard it, doin about 35 MPH.

 

J

jtroush2002

New Member

Jun 13, 2005

41

0

0

please ship to: Irving, TX

Dec 26, 2006

#16

• Dec 26, 2006

• #16

any codes?
first off check your battery, coils and spark plug wires, check spark plugs, any misfires?, spark @ cyl., check fuel pump and voltage to it, fuel filter, injectors, stuck PCV valve, IAC, TPS, vacuum leaks and check the EVAP system.
these are not in specific order, just throwing out things you should check.

 

LaserRed01GT

Banned

Oct 3, 2006

739

3

0

Clearwater, FL

Dec 26, 2006

#17

• Dec 26, 2006

• #17

First thing to always do is get the car on a scanner. At least then you can possibly pinpoint where to start looking. Look at things like your O2 readings, O2 crosscounts, pulsewidths, sensor data, etc.

I also agree that it would be a good idea to check the plugs. These motors do not play nice with spark plugs. If you do end up checking the plugs, post some clear closeup pics so we can help you read them.

 

ProCharger GT

Member

Jun 3, 2004

153

0

16

Cleveland

Dec 26, 2006

#18

• Dec 26, 2006

• #18

Not throwing any codes, battery is new, coils checked fine. Fuel pumps are brand new, along w/ injectors and BAP. PCV valve was checked, it's fine. IAC is under the P-51 so it's gonna be difficult to check that w/o ripping apart the front of the engine again, but if it must be done - it must be done. When it does run, I don't hear any vaccuum leaks, nor do I see anything loose. We bypassed the blower, all the accessories, and the MAF, unplugged the TPS - same issue.

As far as O2 stuff goes, it was hooked to the dyno recently and all the a/f curves were dialed in. I'll try and pull the plugs sometime between today and tomorrow, at least pull a few, and see if that's causing the issue. I'm also gonna go pick up a fuel filter.

 

stangman

15 Year Member

Jul 10, 2003

2,690

10

69

in a 3 bed, 2 bath

Dec 26, 2006

#19

• Dec 26, 2006

• #19

the98stang said:

You wouldn't smell gas if it was running lean....

Click to expand...

not true

 

mity2

I like Pro3 and all I got was this crappy CT.

Jul 24, 2003

2,872

3

48

StateCollege PA

Dec 26, 2006

#20

• Dec 26, 2006

• #20

I would think IAC myself.
I've replaced IAC 3 times. 2nd one lasted less then 6 months...