Maf problems
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Intermediate
Joined: Jun 2019
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Maf problems
Ok so I parked my 89 vet with the l98 tpi 6 speed 4 days ago I was running then. I then replaced the 2 relays that run the maf the power and the burn off. Well now the thing stutters super hard and won't stay running with out having a bit of throttle. I put the old relays back in still doing it. I have power going to the maf. Now question is could replacing those relays have some how burn up the maf?
Le Mans Master
Joined: Jul 2004
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From: Clifton Park, NY ............Clearwater, FL ... 85 Original Owner
Ok so I parked my 89 vet with the l98 tpi 6 speed 4 days ago I was running then. I then replaced the 2 relays that run the maf the power and the burn off. Well now the thing stutters super hard and won't stay running with out having a bit of throttle. I put the old relays back in still doing it. I have power going to the maf. Now question is could replacing those relays have some how burn up the maf?
Unplug the MAF. If it runs better, you need to replace it
Last edited by Cruisinfanatic; Jul 8, 2019 at 04:49 PM.
Thread Starter
Intermediate
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It runs the same with or with out the maf. If your talking about it going to limp mode my model dose not have it.
I replaced the relays couse it was hard to start rough idle and anything past half throttle the car starts stuttering really bad. A few articles I red said that the burn off relay bad can couse this.
I replaced the relays couse it was hard to start rough idle and anything past half throttle the car starts stuttering really bad. A few articles I red said that the burn off relay bad can couse this.
Team Owner
Joined: Dec 2000
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From: SE NY
Cruise-In II Veteran
Check for any trouble codes. If no codes then MAF & relays should be fine.
Sounds like a check of manifold vacuum and fuel pressure might be in order. Also plugs & wires might need to be refreshed.
Sounds like a check of manifold vacuum and fuel pressure might be in order. Also plugs & wires might need to be refreshed.
Team Owner
Joined: Sep 2001
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From: Athens AL
C7 of the Year - Unmodified Finalist 2021
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MAF does not necessarily trigger a code immediately but should after a couple drives.
If it was the MAF and you proved it to be the MAF, then yes you should change both relays with it, but I don't see where you've proven it was the MAF. Try unplugging it and see if it runs smoother.
Being hard to start and a rough idle would make me thing a CTS failure, TPS/IAC, vac leak.
If it was the MAF and you proved it to be the MAF, then yes you should change both relays with it, but I don't see where you've proven it was the MAF. Try unplugging it and see if it runs smoother.
Being hard to start and a rough idle would make me thing a CTS failure, TPS/IAC, vac leak.
