Maf deletion
#1
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Car: 86 t/a , 87 t/a
Engine: 305 tpi / 350 tpi
Transmission: 4 speed auto
Maf deletion
Can anyone advise on the following , luke from down under , i purchased a 89 gta 5.7 , i have mechanical knowledge , the car runs with the maf disconnected , it is unplugged , it seems to run solely from throttle position switch , is this possible ? , if so , what modifications would of been done , ? , would the ecm be standard ? , would they have reprogrammed the prom ? , would any wiring be altered regarding ecm ? , cheers luke
#2
Supreme Member
Re: Maf deletion
From what I've read the ECM will default into a speed density mode and the motor will run from that, but should have a service engine light if nothing else was done.
#5
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Car: 86 t/a , 87 t/a
Engine: 305 tpi / 350 tpi
Transmission: 4 speed auto
Re: Maf deletion
Thankyou for replys , the car came with the maf unplugged , it runs fine , when running , service engine light is on , if i try to insert plug on maf , it runs rough , is it possible for vehicle to be tuned bypassing maf ? , would that be possible ? , if so would they re program the prom , ? , is it a common thing to delete the maf , ? , i havnt any history of vehicle , it arrived with this setup .
#6
Senior Member
Re: Maf deletion
Thankyou for replys , the car came with the maf unplugged , it runs fine , when running , service engine light is on , if i try to insert plug on maf , it runs rough , is it possible for vehicle to be tuned bypassing maf ? , would that be possible ? , if so would they re program the prom , ? , is it a common thing to delete the maf , ? , i havnt any history of vehicle , it arrived with this setup .
#7
Supreme Member
iTrader: (16)
Re: Maf deletion
Always toyed with the idea of running an LS1 MAF w/translator and extended range chip. If I get my hands on a decent Iroc project, I might do that. Before Turbo Dave passed away, he always encouraged me to go that route. But I digress. Keep the MAF...
- Rob
- Rob
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#8
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Re: Maf deletion
Thankyou for replys , the car came with the maf unplugged , it runs fine , when running , service engine light is on , if i try to insert plug on maf , it runs rough , is it possible for vehicle to be tuned bypassing maf ? , would that be possible ? , if so would they re program the prom , ? , is it a common thing to delete the maf , ? , i havnt any history of vehicle , it arrived with this setup .
Trying to look for a reason for this to be correct is simply silly. The car is broken and needs to be properly repaired. Despite what you think, it is not "running fine" with the SES light on and the MAF unplugged. It may run, but without the MAF it's not going to run correctly or have full power. Talk to the computer - get some live data and find out what the actual problem is (with the MAF correctly connected).
GD
#9
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Re: Maf deletion
The 165 can be converted to map with the 808 Aussie code
https://www.thirdgen.org/forums/diy-...f-165-map.html
https://www.thirdgen.org/forums/diy-...f-165-map.html
#11
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Car: 86 t/a , 87 t/a
Engine: 305 tpi / 350 tpi
Transmission: 4 speed auto
Re: Maf deletion
Overall , would the following be correct , spark and injector pulsing are controlled by the following , maf sensor , tps , coolant temp sensor , ignition module are these the primary feedback , for injector and spark ?
#12
Supreme Member
iTrader: (1)
Re: Maf deletion
ALL the sensors play a part in fuel control. Primarily the MAF and O2 though. If the MAF is bad it can dramatically alter fueling. Unplugging a bad MAF *often* results in the engine running better. But diagnostics must be performed.
GD
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