why so ruff without MAF?
Safety Car
Joined: Nov 2005
Posts: 4,590
Likes: 48
From: W MI
You are seeing retuned cars meant to handle not having a MAF. They reprogram the computer to use default values in place of what the MAF would have found.
I'd say get a nice used MAF from Vette2Vette or another forum member and put it in. I bought a used one from Vette2Vette for $80 shipped to my door and it works great. They are easy as pie and small children can do it easily when given the instructions and a screwdriver.
Just a question, is there a Service Engine Soon light on? If you have any of the MAF trouble codes you can troubleshoot down the line and get back to running great.
EDIT - I forgot to note that I am talking about cars that originally had a MAF. SD cars are explained well below.
I'd say get a nice used MAF from Vette2Vette or another forum member and put it in. I bought a used one from Vette2Vette for $80 shipped to my door and it works great. They are easy as pie and small children can do it easily when given the instructions and a screwdriver.
Just a question, is there a Service Engine Soon light on? If you have any of the MAF trouble codes you can troubleshoot down the line and get back to running great.
EDIT - I forgot to note that I am talking about cars that originally had a MAF. SD cars are explained well below.
Last edited by 80sRule; Jan 25, 2007 at 10:16 AM.
Team Owner
Joined: Mar 2001
Posts: 54,124
Likes: 30
From: Cincinnati, Oh USA
If you unplug the MAF, your engine runs in limp home mode and uses a look up table to keep the engine running and it can't control the engine as well as the precise inlet air speed info it gets from the MAF. Get a known good MAF.
Instructor
Joined: Dec 2006
Posts: 139
Likes: 0
From: Deep in The Heart of Dixie
There are some C4s that are speed density cars and came without a MAF. On the other hand, we have at least one member who could not make his work and removed it.
Burning Brakes
Joined: Jan 2007
Posts: 1,170
Likes: 86
cars without mafs that use a speed density system use a preprogramed ecu that adjusts seting in the motor acording to throttle position, where as cars with a maf use a ecu that reads how much air is coming into the motor and adjust engine setings acordingly. cars with mafs tend to idle a little smoother, have beter throttle response and are more open to internal engine mods. where the speed density cars will not run as well if any of the engine mods cuase the motor to run outside its preprogramed peramters. say like a cam. however. speed density ecu's arent necarily a bad thing if you have an aftermarket programable one, but as far as stock ones go, in my short automitive career ive never seen one, but thats not to say they dont exsist on some other car. obdII ecu's you can change things with programers
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