MAF problems???
Thread Starter
Drifting
Joined: Nov 2001
Posts: 1,587
Likes: 0
From: Omaha NE
MAF problems???
I was told by someone that my MAF may be going bad.
Problems:
1)when giving it 40-60% throttle, it bogs some(automatic)
2)at idle it sometimes misses(new plugs and wires, but going to replace anyway)
Problems:
1)when giving it 40-60% throttle, it bogs some(automatic)
2)at idle it sometimes misses(new plugs and wires, but going to replace anyway)
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Re: MAF problems??? (BAdAzZV8)
I've heard that if you unplug the MAF and it runs better it's a good indication of a bad unit.
A scan tool would let you look at the MAF readings and other sensors to help in the diagnosis.
A scan tool would let you look at the MAF readings and other sensors to help in the diagnosis.
Pro
Joined: Jul 2001
Posts: 557
Likes: 0
From: Taxahoma
Re: MAF problems??? (vader86)
My experiance with the l98, unplug the maf and it will barely run at all. Almost sounds like fuel problem, fuel pump, filter. Just a guess, need to pull the codes if there are any to rule something else out.
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Thread Starter
Drifting
Joined: Nov 2001
Posts: 1,587
Likes: 0
From: Omaha NE
Re: MAF problems??? (vader86)
No codes.
I was thinking about the fuel pump or maybe the injectors, but I'd rather not have to change those unless I have to. I don't really like changing expensive stuff out just for trouble shooting, but I guess I may have to.
BTW, where are all the LT-1 guys on this?
I was thinking about the fuel pump or maybe the injectors, but I'd rather not have to change those unless I have to. I don't really like changing expensive stuff out just for trouble shooting, but I guess I may have to.
BTW, where are all the LT-1 guys on this?
Team Owner
Joined: Sep 2001
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From: Athens AL
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Re: MAF problems??? (BAdAzZV8)
well if youre missing badly w/o a code the first thing i would look at is the Optispark, fuel filter or bad injectors
Thread Starter
Drifting
Joined: Nov 2001
Posts: 1,587
Likes: 0
From: Omaha NE
Re: MAF problems??? (vader86)
It's not throwing any codes at all.
And it's not really a miss, it's more like a bog(like it's going to stall or something). It's like with a manual you release the clutch but don't give it enough gas, it bogs heavily, but mine's an automatic.
And it's not really a miss, it's more like a bog(like it's going to stall or something). It's like with a manual you release the clutch but don't give it enough gas, it bogs heavily, but mine's an automatic.
Pro
Joined: Sep 2001
Posts: 743
Likes: 4
From: Guyton GA
Re: MAF problems??? (BAdAzZV8)
I may be mistaken, but on your car if the MAF goes bad the MAP sensor takes over. So in other words it should still run well and give a code for the MAF. Any other symptoms.
Burning Brakes
Joined: Jun 2001
Posts: 838
Likes: 2
From: Out by the bridge again, TampaBay
Re: MAF problems??? (BAdAzZV8)
Get a fuel pressure gauge that attaches to the schrader valve on the fuel rail. Check your pressure at idle and when driving with the above symptoms (tape it to the windshield). If when you go WOT the fuel pressure has a sharp drop and doesn't return quickly then it's a fuel delivery problem. Change the fuel filter and test again etc. :smash:
It could also be a clogged cat if you have ruled out any ignition related problems. What are the temps and any other symptoms? On a 94 a bad MAF sensor should throw a code. Do you know anyone with Autotap to see what's going on? Diagnose the problem before you throw parts at it. :yesnod:
It could also be a clogged cat if you have ruled out any ignition related problems. What are the temps and any other symptoms? On a 94 a bad MAF sensor should throw a code. Do you know anyone with Autotap to see what's going on? Diagnose the problem before you throw parts at it. :yesnod:
