MAF Sensor!!!????
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Joined: Jan 2005
Posts: 85
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From: Pensacola Fl
MAF Sensor!!!????
I have an 88 Vette 4+3 Coupe, I'm having problems with Code 33. I decided to go straight to the possible main problem and replace the MAF sensor with a REMANUFACTURED MAF sensor. I put it in the car ran great, problem fixed? Wrong. After about 20 miles the Service engine soon light came back on and the Surging and chuging experienced with suspected bad MAF sensor, returned. Well I went back to Schuck's Auto and told them I needed another MAF sensor to replace the new REMANUFACTURED one that i originally bought to solve my problem. Well I got another REMAN MAF sensor and installed in the parking lot of Schuck's. The car still Surges and Chugs, and the light still reads code 33. FYI i disconnected the battery to erase all previous codes, multiple times. Also I have the 88 shop service manual and others, but I'm having a hard time interpreting the Shop manual diagnostic sequence.
I need help, If i've already replaced the MAF sensor where should i be looking next?
I need help, If i've already replaced the MAF sensor where should i be looking next?
Team Owner
Joined: Sep 2001
Posts: 62,145
Likes: 1,730
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
The 2 relays behind the battery on the firewall, burnoff and power relay.
Those are cheap and are easy to fix and should always be replaced before spending the $$ on the MAF.
Those are cheap and are easy to fix and should always be replaced before spending the $$ on the MAF.
Pro
Joined: Aug 2004
Posts: 581
Likes: 0
From: Charlotte North Carolina
Look at my thread re 1985 burn off module. Talk about a pain.
For you, it should be fairly simple. At least you will not have to remove your entire dash to get to the parts.
A simple test.
Clear codes by disconnecting battery ground cable for 30 seconds.
Reconnect battery ground cable.
Disconnect the MAF sensor connector. Open your throttle bottle blade and slip the connector in behind and close the tb. This is a good way to hold the connector steady for testing.
Grab a test light, connect it to battery ground. If you can, use the battery ground and not the frame.
Turn the ignition switch on. Do not start the car.
Place the test light on terminal e of the MAF connector. You should see 12 volts.
If you don't see 12 volts, replace the relays noted in another replay to your post.
Hope this helps.
If you see 12 volts as described above, then more testing may be needed.
For you, it should be fairly simple. At least you will not have to remove your entire dash to get to the parts.
A simple test.
Clear codes by disconnecting battery ground cable for 30 seconds.
Reconnect battery ground cable.
Disconnect the MAF sensor connector. Open your throttle bottle blade and slip the connector in behind and close the tb. This is a good way to hold the connector steady for testing.
Grab a test light, connect it to battery ground. If you can, use the battery ground and not the frame.
Turn the ignition switch on. Do not start the car.
Place the test light on terminal e of the MAF connector. You should see 12 volts.
If you don't see 12 volts, replace the relays noted in another replay to your post.
Hope this helps.
If you see 12 volts as described above, then more testing may be needed.
