late redtop help 1993

[gsiastra]

need help locating the m,a,p sensor or the manifold absolute pressure sensor on a late astra gsi mk3 ???????? help

[esselte]

You should be looking for something like this:

[gsiastra]

thats wot am looking for , just cant seem to find it on the car? thanks

[esselte]

gsiastra said:

thats wot am looking for , just cant seem to find it on the car? thanks

from migweb.co...

"....MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR. This sensor is mounted on or connected to the intake manifold to monitor intake vacuum. It changes voltage or frequency as manifold pressure changes. The computer uses this information to measure engine load so ignition timing can be advanced and retarded as needed. It performs essentially the same job as the vacuum advance diaphragm on an old fashioned mechanical distributor.

On engines with a "speed density" type of fuel injection, the MAP sensor also helps the PCM estimate airflow. Problems here may cause an intermittent check engine light (light comes on when accelerating or when the engine is under load), hesitation when accelerating, elevated emissions and poor engine performance. The engine will run with a bad MAP sensor, but it will run poorly. Some PCMs can substitute "estimated data" for a missing or out of range MAP signal, but engine performance will be drastically reduced.

MAP Sensor Strategies: Some MAP sensor problems are not the fault of the sensor itself. If the vacuum hose that connects the MAP sensor to the intake manifold is loose, leaking or plugged, the sensor can’t produce an accurate signal. Also, if there is a problem within the engine itself that causes intake vacuum to be lower than normal (such as a vacuum leak, EGR valve that’s stuck open or leaky PCV hose), the MAP sensor’s readings may be lower than normal....."



Look here

HTH

Edited by esselte on Tuesday 10th July 21:20

[gsiastra]

cheers for the help mate

[esselte]

Did you find it?

[900T-R]

Just follow the vac lines from the inlet manifold... one of them is bound to have a MAP sensor on the other end... Without intimate knowledge of the vehicle, it could be anywhere - under dashboard area, near the engine management ECU, hiding somewhere behind a false bulkhead... (I find at that ppint, a Haynes manual or borrowing the appropriate section(s) of the workshop manual from your local friendly dealer/indie if you have a good relationship with them is preferable to dismantling half the car in search of whatever I'm searching for)...

[gsiastra]

no not yet . the haynes manual came this morning from ebay and says it should be located under the rain tray at the back of the engine bay , ha ha no such luck , well at least i now know roughly what I'm looking for, thanks for the help guys I'll keep you posted on or if i find it ha.