maf or not?
Former Vendor
Joined: Jun 2001
Posts: 7,204
Likes: 6
From: St Marys PA
Re: maf or not? (fastrob)
FastRob,
If you recently had your battery disconnected the computer will search for the correct idle. Mine does it every time I disconnect the battery. Allow it to idle for a while after driving maybe 3-4 miles and see it it straightens out. Mine usually goes back to a steady idle after I do that. Good luck.
If you recently had your battery disconnected the computer will search for the correct idle. Mine does it every time I disconnect the battery. Allow it to idle for a while after driving maybe 3-4 miles and see it it straightens out. Mine usually goes back to a steady idle after I do that. Good luck.
Team Owner
Joined: Sep 2001
Posts: 62,154
Likes: 1,731
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Re: maf or not? (ski_dwn_it)
Do what he said first. Then if it does it after the car is warmed up, disconnect the MAF and see if the idle improves any. You could also tap the MAF and see if the idle changes. This would mean a bad MAF, and youll have to change the relays with it. Otherwise, if its surging when warm, you should take a look at the IAC valve, may be dirty.
Team Owner
Joined: Sep 2001
Posts: 62,154
Likes: 1,731
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Re: maf or not? (fastrob)
its in the TB, youll have to remove it completely, i'm sure someone else will chime in as i havent cleaned mine myself.
Safety Car
Joined: Dec 2000
Posts: 3,767
Likes: 5
From: Jacksonville Fl
Re: maf or not? (fastrob)
It's not too hard, plan a couple of hours of daylight to take it off ( 4 bolts, two hoses, two wire connectors and throttle/cruise/trans cables ).
Once off, remove the screws to the IAC ( which looks like a small cylindrical device sticking into the side of the throttle body.) Remove the IAC motor by sliding it out, and clean it with throttle body cleaner and a toothbrush. Do not try to reposition it at all.
The throttle body will need to be cleaned the same way, with throttle body cleaner and a toothbrush. When all is clean, just reverse the disassembly steps and reinstall it with a new throttle body gasket.
This will usually cure a fluctuating idle problem, as well as increase idle-to-throttle transition smoothness.
Once off, remove the screws to the IAC ( which looks like a small cylindrical device sticking into the side of the throttle body.) Remove the IAC motor by sliding it out, and clean it with throttle body cleaner and a toothbrush. Do not try to reposition it at all.
The throttle body will need to be cleaned the same way, with throttle body cleaner and a toothbrush. When all is clean, just reverse the disassembly steps and reinstall it with a new throttle body gasket.
This will usually cure a fluctuating idle problem, as well as increase idle-to-throttle transition smoothness.
Instructor
Joined: Oct 2000
Posts: 206
Likes: 0
From: Nashville, Tn. 37211 TN.
Re: maf or not? (fastrob)
Come on, jump in there and get your hands dirty! It is not a major job but it is impossible to remove the IAC without taking loose the throttle body. Probably needs a good cleaning anyway. I believe there is a "Tech Tip" on this procedure on this site.
Good luck and if you don't have a repair manual, get one.
:yesnod:
Good luck and if you don't have a repair manual, get one.
:yesnod:
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Thread Starter
Instructor
Joined: Jun 2001
Posts: 177
Likes: 0
From: sunrise fl
Re: maf or not? (Camvette)
oh ok now i know what you are talking about i thought you were talking about the plenum got them confused thank god it wasnt what i thought it was ok now i can do this no problem i do have a manual to fix the car top to bottem got it today so i will let you know how it turnd out thank you all for the help people in hear are so helpfull and nice i love this place :cheers: :seeya
Instructor
Joined: Jul 2001
Posts: 146
Likes: 0
From: Hermitage, TN
Re: maf or not? (fastrob)
Before you reinstall your IAC valve check the length from o-ring to end of pintle. On my '95(dont know if your measurement should be same) the manual said to adjust to 1 1/8 inch. I cleaned mine and adjusted it, but still have this pulsing or stumbling idle. :mad :rolleyes: :bs