MAF, what next
Thread Starter
Intermediate
Joined: Jun 2007
Posts: 25
Likes: 0
MAF, what next
I just got my first vette, 89. Check engine light , garage checked code, replaced MAF. 5 starts later, the check engine light back on, Help. Is this a money pit. What can i look for. New Vette owner of an older vette.
Team Owner
Joined: Jan 2003
Posts: 20,306
Likes: 242
From: Summerland B.C. Canada
Did they replace the 2 relays that are involved with MAF operation ??
Here are the 3 MAF codes, follow the flow chart of the correct code and see if you can fix it yourself.
http://members.shaw.ca/corvette86/Code%2033.pdf
http://members.shaw.ca/corvette86/Code%2034.pdf
http://members.shaw.ca/corvette86/Code%2036.pdf
Welcome aboard
Here are the 3 MAF codes, follow the flow chart of the correct code and see if you can fix it yourself.
http://members.shaw.ca/corvette86/Code%2033.pdf
http://members.shaw.ca/corvette86/Code%2034.pdf
http://members.shaw.ca/corvette86/Code%2036.pdf
Welcome aboard
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Originally Posted by CN4
MAF, what next
RACE ON!!!
Slingshot
Joined: Dec 2001
Posts: 3,817
Likes: 24
From: Charlotte NC
Code 33 MAF
I had a really hard to fine code 33 (MAF) problem a few years ago. I'm sorry to say that I spent over $1500 and 45 days in the local GM dealer only to find out after much tiral and error and many new parts (relays, MAF, sensors, etc, etc.) that the problem was the ECM chip (a $120 part). So, be careful with the dealers, they just start changing out parts and relays and running up terrific bills.
Race Director
Joined: Aug 2000
Posts: 14,130
Likes: 7
Cruise-In II Veteran
I had a really hard to fine code 33 (MAF) problem a few years ago. I'm sorry to say that I spent over $1500 and 45 days in the local GM dealer only to find out after much tiral and error and many new parts (relays, MAF, sensors, etc, etc.) that the problem was the ECM chip (a $120 part). So, be careful with the dealers, they just start changing out parts and relays and running up terrific bills.
I will be the first to admit though,sometimes a ecm is a PITA to diagnose if the problem is very intermittent,but in your case they had the code and kept throwing everything at it?
If they threw all that at it,and nothing fixed it until an ecm,to me thats a big sign they didnt know how to check and backtrack to the ecm.You should not have to pay for parts or labor that did NOT repair the problem,ever.
This is WHY CFI tells everyone to use the FSM..at least youll have a way better chance of repairing it yourself,than alot of people out there who want to fix your car by guessing like we do on here.
Team Owner
Joined: May 2002
Posts: 24,337
Likes: 25
From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
The car will continue to be a money pit if you pay mechanics to throw parts at it without diagnosing it.
You really need the diagnostic flow chart from the service manual to find the problem. Mechanics and even GM dealerships have access to this information but tend to only use it as a last resort when the customer's credit card is maxed out and they are raving pissed at the service counter and scaring off potential customers.
You really need the diagnostic flow chart from the service manual to find the problem. Mechanics and even GM dealerships have access to this information but tend to only use it as a last resort when the customer's credit card is maxed out and they are raving pissed at the service counter and scaring off potential customers.
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Slingshot
Joined: Dec 2001
Posts: 3,817
Likes: 24
From: Charlotte NC
You are correct
Yes, you guys are correct. The FSM is a God send and so is this Forum. In my case GM never correctly diagnosed the problem; they just kept throwing parts at it and some of the remanufactured parts were defective which just exacerbated the problem.
Out of frustration I joined this Forum seeking a resolution. In the end, it was technical advice from this Forum that finally identified the problem. I have been a Forum advocate ever since and have not been back to the dealership for a major repair since joining.
Out of frustration I joined this Forum seeking a resolution. In the end, it was technical advice from this Forum that finally identified the problem. I have been a Forum advocate ever since and have not been back to the dealership for a major repair since joining.