Chevy 2 5 Mat Sensor High Idle

When at rest the map sensor reads atmospheric pressure at sea level 29 93 in.

Chevy 2 5 mat sensor high idle.

It is not a sensor since the check engine light is not lit. The ecm uses map sensor data to run crucial calculations such as engine load fuel injector pulse and spark advance. Idles fine in park on start up it may die but fires right back up. If the valve fails or has any issues it can cause the idle speed to be thrown off.

You can throttle down in idle most time no worries and when yo u let off the gas she goes back to a smoot. Ok i have a 93 shevy c1500. Jump to latest follow. 3 start the engine again and let it idle in park for 3 minutes one more time.

That is a dirty throttle body remove it and clean with carburator. Check engine light comes on. 1993 chevy c1500 5 7 ruff idle dying more so in gear than not. Hello everyone new member first time posting so take it easy please engine and truck info.

This map sensor is mounted directly to the intake manifold but others might be connected by a hose. 1 start the engine and let it idle in park for 3 minutes. Also remove the idle speed sensor and check for a lot of dirt around the spring loaded plunger and clean or replace should work fine after that. The throttle body gasket had broken and was letting in too much air causi.

Making it run this high. So does the the mat sensor that is in the manifold. 89 s10 has a high idle whats wrong with a 89 chevy s10 2 5 liter that has a high idle. During these run periods you may see a check engine light.

2 9l i4 2008 colorado auto problem symptoms. See picture seems like its lacking power when under load trying to go uphill. When it first starts cold it revs low like it would when the engine was warm then proceeds to 2300 rpms. Idle surges and oscillates and drops low in the process of surging.

After trying several other fixes i finally diagnosed and repaired the problem part. 2 after 3 minutes turn the engine off and leave it off for 60 seconds. Step 2 the idle air control motor valve is responsible for controlling the engine idle speed if this part fails or becomes weak the engine idle speed could become erratic additionally this condition may or may not trigger the mil check engine service engine soon light because of the nature of this valve large air volume processed it should be serviced when a tune up is performed. This may result in an unusually high or low idle speed or in some cases a surging idle speed that repeatedly climbs and falls.

Benji jerew flickr cc by 2 0. Chevrolet 1989 s 10 blazer question. During that period the idle may be higher idle than normal.