CODE 33.....HELP!
Thread Starter
Drifting
Joined: Apr 2002
Posts: 1,451
Likes: 0
From: Owensboro Ky
CODE 33.....HELP!
OK I've already done the obvious by replacing the burn off relays but the service engine light is still there. I found a wire rubbing through in the MAF wire harness so I spliced it back together and the light and code are still there. I ordered a test harness so I can check the MAF but it didn't include what the sensor should be reading. So if anyone out there has a service manual for a '88, and would be kind enough to give me the info needed, I would be very greatful. I'll even email you a beer for helping :cheers: .
Le Mans Master
Joined: Oct 2003
Posts: 6,130
Likes: 2
From: seattle WA
Re: CODE 33.....HELP! (ZAD54)
On an 87. The ECM supplies a current limiting 5-volt source on the signal line, and the MAF sensor pulls the voltage low (about .4V) with low air flow and up to about 5 volts with high air flow such as WOT. But the code thrown if the sensor fails is a 33 or 34. Hope this helps. ;) Also, you need to disconnect your battery for a few minutes to clear the code :seeya
[Modified by rick lambert, 5:15 PM 4/28/2004]
[Modified by rick lambert, 5:15 PM 4/28/2004]
Team Owner
Joined: Sep 2001
Posts: 62,155
Likes: 1,731
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Re: CODE 33.....HELP! (ZAD54)
Vaccuum leaks can actually trigger that code too. But if you replaced both relays and there are no shorts or leaks, it would then probably be the MAF itself.
There is an outside chance that its the ECM, but way outside.
There is an outside chance that its the ECM, but way outside.
Race Director
Joined: Aug 2000
Posts: 14,130
Likes: 7
Cruise-In II Veteran
Re: CODE 33.....HELP! (ZAD54)
Hey Buddy,
Did the green wire at the harness break?Is that the one you fixed?
Did you erase the code after your repairs to make sure its gone?(disconnect the battery for a few)
Just asking the simple stuff before going further.
:)
Did the green wire at the harness break?Is that the one you fixed?
Did you erase the code after your repairs to make sure its gone?(disconnect the battery for a few)
Just asking the simple stuff before going further.
:)
Thread Starter
Drifting
Joined: Apr 2002
Posts: 1,451
Likes: 0
From: Owensboro Ky
Re: CODE 33.....HELP! (Bill's86Coupe)
Hey Bill, How ya been?? Well I removed the smog equipment and when I did that it left the perfect spot for my maf wires to drop down and rub on the upper pulley. I'm not sure which one it was. Its also possible that I didn't get it spliced back together good enough. Man I hate wiring. :rolleyes:
P.S. Going to the Cruise In Bill?
P.S. Going to the Cruise In Bill?
Race Director
Joined: Aug 2000
Posts: 14,130
Likes: 7
Cruise-In II Veteran
Re: CODE 33.....HELP! (ZAD54)
Hey man,
Been doing allright,thanks for asking.Just real busy as always.
Go check the wires carefully to make sure they all good and the tight.
Damn MAF sensors can be an expensive guess to replace at times.
Be sure to clear the codes when youre done.
ABout the cruise In,i have no idea.My vette isnt anywhere near done yet and I havent signed up...so really dont know whats in store yet.Will let ya know.
:cheers:
Been doing allright,thanks for asking.Just real busy as always.
Go check the wires carefully to make sure they all good and the tight.
Damn MAF sensors can be an expensive guess to replace at times.
Be sure to clear the codes when youre done.
ABout the cruise In,i have no idea.My vette isnt anywhere near done yet and I havent signed up...so really dont know whats in store yet.Will let ya know.
:cheers:
Thread Starter
Drifting
Joined: Apr 2002
Posts: 1,451
Likes: 0
From: Owensboro Ky
Re: CODE 33.....HELP! (Bill's86Coupe)
I gave the wires a good pull when I was done splicing them back together( used butt connectors). I've got a friend with an '88 also, so I think I'm going to swipe his and see if that makes any difference. And I left it sit for about 3 hours with the battery unplugged last night, as soon as I hooked it back up and started the engine, it came right back. I think I'll go check the codes again and see if 33 was the only one. I know the wires were grounding out on the pulley and throwing a few sparks, maybe I did some damage to the MAF when that happened. But being 16 years old, I guess might be about time for it to go anyway. Thanks Bill let me know if you decide on the Cruise In. Hug that beautiful wife and kids for me! :jester
[Modified by ZAD54, 1:13 PM 4/28/2004]
[Modified by ZAD54, 1:13 PM 4/28/2004]
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Thread Starter
Drifting
Joined: Apr 2002
Posts: 1,451
Likes: 0
From: Owensboro Ky
Re: CODE 33.....HELP! (MtlSphere)
Check the 10 amp "cluster" fuse. I replaced my MAF last weekend because of a $00.50 fuse. :mad
:seeya
:seeya
