1996 Monte Carlo 3.1 high inconsistent idle.

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Aug 21, 2022 | 06:13 PM

#11

DudeWithThe96

Thread Starter

Joined: Jan 2021

Posts: 30

Quote:

Originally Posted by bumpin96monte

What are the units on those map readings? There's different ways readers can output data - raw or modified to various units.

Have you tried blocking off the intake inlet to see what happens? Its clearly getting more air from somewhere, that could help rule out if its picking it up via the MAF/ intake tube or of its getting sucked in elsewhere.

I can get another reading soon. Months back I blocked it off where the tubing went into the upper plenum and it did slow the engine now.

Feb 18, 2025 | 02:26 PM

#12

Rio976

Joined: Feb 2025

Posts: 7

High idle on the monty

Quote:

Originally Posted by DudeWithThe96

I can get another reading soon. Months back I blocked it off where the tubing went into the upper plenum and it did slow the engine now.

Did you ever figure out what was causing the high idle issue? Thanks

Feb 19, 2025 | 10:08 AM

#13

Rio976

Joined: Feb 2025

Posts: 7

Quote:

Originally Posted by DudeWithThe96

So I’ve got a new MAP sensor in, now idles about 1000-1100 which is still a little high but better than before. It still likes to climb up in rpm after running for a while so I’m sorta at a lost for further ideas.

Did you ever find out what was causing the high idle? Thanks