MAF Problem?

**RRG75** · 08-13-2012, 07:57 AM

2000 Camaro SS

Quick summary of my problem-
Car was running fine until this morning.
The Service Engine Soon light came on/flashing and the car started running rough.
Within 3 miles it got progressively worse until the car eventually stalled and would not start again.
After having the car towed back to my house I ran the codes and got P0101 and P0301.

I've seen where the MAF can make the car run rough, but now it won't start at all?

Has anyone experienced this?

I figure i'd start with:
Cleaning MAF/replacing plugs & wires.
If that doesn't work, replacing MAF.

Any other suggestions?

Thank you

**0rion** · 08-13-2012, 10:43 PM

yeah....I would think the car should definitely start. 301 is a misfire cylinder 1 in case you haven't looked it up yet......sure it wasn't a p0300 which would be random multiple misfires? Might pull those plugs and see what they look like....maybe they're just all fouled or something??

**RRG75** · 08-16-2012, 04:07 PM

it was definately:
P0101 MAF
P0301 Cylinder 1 Misfire

The circuit board on the side of MAF was missing the cover and was covered in sludge. I figured that had to be it. I reset the codes, replaced the MAF........the car does the same thing--starts upvery hard, runs rough for a few seconds, and dies.
P0101 and P0301 did not come back. However, it threw a P0108 (MAP High Output) briefly, which went away and will not come back. I find it very unlikely that the MAF and MAP went at the sametime.
The car is getting fuel, the car is getting spark.

I'm at a loss.

Any ideas?

**silverWS6** · 08-16-2012, 05:24 PM

Try another MAF, anybody you know with another LS1 that'll let you run their MAF for few minutes maybe

**RRG75** · 08-16-2012, 05:33 PM

The MAF code did not come back after putting a new DELCO one in.....

**silverWS6** · 08-16-2012, 05:47 PM

Ahhh I missed that part. Have you pulled the plugs?

**2002ssslp** · 08-16-2012, 06:01 PM

Check the plug wires, one of them may have pulled off. I was at the track last month and when I left the line and hit 2nd gear my SES light started blinking. One of my plug wires came off, I still ran a 14.6 on 7 cylinders. Check the wires.

**pajeff02** · 08-16-2012, 06:04 PM

Check your "ENG SENS" fuse.

**35th-ANV-SS** · 08-16-2012, 06:20 PM

You said you were getting fuel...did you check fuel pressure with an actual fuel gauge at the rail? If so, what fuel pressure reading did you get?

**RRG75** · 08-17-2012, 03:52 AM

ENG SENS Fuse is fine.

Wires are connected.

I didn't check the pressure with a gauge.The fuel pump fires up when the key is on. If i push the valve with a screwdriver fuel squirts out. Repeat key on and there is pressure again.
I do need to check it with a gauge.

But first, I'm going to take the valve cover off..from doing some reading I think it may be a broken valve spring.

**0rion** · 08-17-2012, 06:50 AM

Originally Posted by RRG75

ENG SENS Fuse is fine.

Wires are connected.

I didn't check the pressure with a gauge.The fuel pump fires up when the key is on. If i push the valve with a screwdriver fuel squirts out. Repeat key on and there is pressure again.
I do need to check it with a gauge.

But first, I'm going to take the valve cover off..from doing some reading I think it may be a broken valve spring.

this is definitely a possibility

**RRG75** · 08-17-2012, 04:30 PM

It is definately a broken valve spring.
Can anyone recommend a good stock replacement set?

**0rion** · 08-17-2012, 08:01 PM

do you ever plan on a cam? If so don't replace them with oem...get aftermarket springs. Comp cam 918 springs are pretty popular.

**35th-ANV-SS** · 08-17-2012, 08:16 PM

Those are the ones I'm running.

**RRG75** · 08-18-2012, 04:43 AM

Not really thinking about a cam. Should i just go with stock replacements?

**35th-ANV-SS** · 08-18-2012, 04:44 AM

I have a stock cam.

**RRG75** · 08-18-2012, 05:56 AM

Stock are much cheaper..dilemna.

**0rion** · 08-18-2012, 09:25 AM

the stock ones are also the very reason you're in the situation

Not really much of a decision in my opinion.

Because of the stock valve springs you're 1 dropped valve away from needing a new motor.

**RRG75** · 08-18-2012, 10:03 AM

Good point......leaning toward the 918's.

Should i get the 918 kit with new seals, retainers, keepers, etc?

Does this cover the install? Do i just torque to spec as i go? or do i have to torque them in a specific order in TDC position?
http://www.ls1.com/forums/f7/how-rep...prings-132116/