87 MAF / Speed Density question?
Thread Starter
Melting Slicks
Joined: Dec 2002
Posts: 2,480
Likes: 62
From: Middletown DE
87 MAF / Speed Density question?
Hey,
My sister has an 87 vette and the service engine light intermittently comes on and it reads bad MAF, I tried cleaning the contacts and what not and still does this.
I have been looking on e-bay for a new or used MAF and have a few questions...
1. Will any MAF from any 85-89 TPI work? - Camaro, Iroc, Firebird?
2. I see people are selling Speed Density ECM's, what is involved, can i just plug in the new ecm and off with the MAF??? no other parts needed??
Thanks!
John
[Modified by 99firetruck, 4:45 AM 4/22/2003]
My sister has an 87 vette and the service engine light intermittently comes on and it reads bad MAF, I tried cleaning the contacts and what not and still does this.
I have been looking on e-bay for a new or used MAF and have a few questions...
1. Will any MAF from any 85-89 TPI work? - Camaro, Iroc, Firebird?
2. I see people are selling Speed Density ECM's, what is involved, can i just plug in the new ecm and off with the MAF??? no other parts needed??
Thanks!
John
[Modified by 99firetruck, 4:45 AM 4/22/2003]
Team Owner
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St. Jude Donor '03-'04
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Re: 87 MAF / Speed Density question? (99firetruck)
What is the troubleshooting code that you're reading?
The speed density L98 cars ('90-'91) use a different wiring harness as well as the ECM. Too much trouble to convert just for casual maintenance.
The speed density L98 cars ('90-'91) use a different wiring harness as well as the ECM. Too much trouble to convert just for casual maintenance.
Team Owner
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From: Athens AL
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Re: 87 MAF / Speed Density question? (99firetruck)
You must fix the code thats being set.
Replace the two relays behind the battery on the firewall, together it shouldnt be but $20. Disconnect the battery and see if the codes come back.
If they come back, replace the MAF sensor. Any 85-89 MAF should work, as to whether the F-body will work, i dont know.
Replacing the ECM will end up costing more, youd do away with MAF but you still have to buy a MAP sensor and fabricate a new intake to fit in place of where the MAF would go.
Replace the two relays behind the battery on the firewall, together it shouldnt be but $20. Disconnect the battery and see if the codes come back.
If they come back, replace the MAF sensor. Any 85-89 MAF should work, as to whether the F-body will work, i dont know.
Replacing the ECM will end up costing more, youd do away with MAF but you still have to buy a MAP sensor and fabricate a new intake to fit in place of where the MAF would go.
Thread Starter
Melting Slicks
Joined: Dec 2002
Posts: 2,480
Likes: 62
From: Middletown DE
Re: 87 MAF / Speed Density question? (vader86)
Well, her boyfriend has a reader program on his laptop and he has cleared the code, but it comes back from time to time...
I dont know the exact code as it has been quite a while since we read it.
A "new" maf is like 200, where the ecm's are going for like 70. I wasnt sure what a map sensor is going to run me, and i am sure i could construct some type of intake to replace the maf....
Thanks for the reply's!
I dont know the exact code as it has been quite a while since we read it.
A "new" maf is like 200, where the ecm's are going for like 70. I wasnt sure what a map sensor is going to run me, and i am sure i could construct some type of intake to replace the maf....
Thanks for the reply's!
