MAP SENSOR REPLACEMENT NUMEROUS TIME

1994 Cadillac Concours

Tiny

ljh

July, 20, 2009 AT 6:56 AM

Engine Performance problem
1994 Cadillac Concours V12 All Wheel Drive Automatic 125000 miles

MY 83 YR OLD FATHER HAS REPEATEDLY REPLACED THE MAP SENSOR IN HIS '94 CADILLAC CONCOURS ONLY TO HAVE THE ISSUE COME UP AGAIN AFTER 2-3 MOS. THE ISSUE IS ROUGH IDLING, STALLING WHILE MAKING A TURN OR BRAKING. IT DOES SHOW A CODE WHEN HE CHECKS IT WHICH IS 21. HE RESERCHES THE CODE EVERY TIME TO TRY AND FIGURE OUT WHAT HE IS DOING WRONG. I KNOW FIRSTHAND HE HAS REPLACED IT OVER 4 TIMES. IT HAS BECOME SUCH A BURDEN HE WANTS TO SELL IT BUT DOES NOT WANT A NEW OWNER TO EXPERIENCE THE SAME PAIN HE IS HAVING. HE IS VERY KNOWLEDGABLE ABOUT AUTOMOBILES AND HAS WORKED EXTENSIVELY ON HIS OWN VEHICLES FOR YEARS.

CAN YOU OFFER ANY OTHER INSIGHT OTHER THAN REPLACE THE MAP SENSOR AGAIN?

SIGN ME,
CONCERNED DAUGHTER LJH

FOUND 656 RELATED QUESTIONS

1 Answer

Tiny

factoryjack

July, 20, 2009 AT 10:58 PM

A sticking open EGR valve may cause the symptoms you are describing. The map sensor code sets as a result of the loss of vacuum with low throttle angle, when it should be high.

Please login or register to post a reply.

 Step by Step video GMC Yukon XL 2000-2006
How to read codes Chevrolet Blazer
Code Read Retrieval/Clear Scion XD
Code Read Retrieval/Clear - Dodge Stratus
Read Codes Like a Pro