ENGINE SURGING

[FRANKS]

REF OUR 1995 ELDO, 65000 MILES:  FOR SOME REASON THE ENGINE SURGES.  IT FEELS AS IF THERE IS A VACUUM LEAKE AS IT PUSHES THE RPMS UP.  THIS IS A VERYBADY SAFTY SITUATION AS IT CAN JUMP WITH OUT NOTICE AND THEREFORE MUST BE KEPT WITH FOOT ON BREAK.  FIRST TIME, A CADILLAC SPECILTY REPAIR SHOP REPLACED THE ENGINE MANAGEMENT COMPUTER.  IT WORKED FOR ABOUT 1 YR.  AND THE PROBLEM STARTED AGAIN.  ABOUT 3 MONTHS AGO, A DIFF. CADILLAC REPAIR SHOP CLEANED ALL THE CONTACTS, REPLACED ALL THE SPARK PLUTS.... IT LASTED FOR ABOUT 3 MONTHS AND HAS STARTED DOING IT AGAIN.  I PLAN TO RETURN TO THIS REPAIR SHOP AND HAVE THEM LOOK AGAIN, WHICH THEY SAID THEY WILL DO.  HAS ANY BODY HAVE ANY IDEAS THAT I CAN PASS ON TO THIS SHOP AS TO WHAT TO LOOK FOR.  YOUR HELP IS GREATLY APPREACED.

FRANK STAGNITTO CLC13539

[Dave Shepherd]

Frank, this will require a full scan for pending codes, also a check for vacuum leaks and analysis of sensor inputs, there is no quick answer for this.

[Andrew Armitage]

Check over at the Cadillac Owner's Forum.  There's a lot of useful info regarding newer Cadillacs there.

http://www.cadillacforums.com/forums/cadillac-seville-cadillac-eldorado-forum/

[FRANKS]

GOOD MORNING AND THANX YOUR REPLY.  I WILL DO AND CHECK SAME OUT.  CAR IS BACK TO THE GUYS AT A&A AUTO, BRENTWOOD, CA.  THEY DID THE 2nd TRY ABOUT 5 MONTHS AGO.  AFTER THAT THE CAR DID WELL, GOT GREAT MPG, PASSED CALIF. SMOG......NOW BACK TO THE SAME PROBLEM.  SOMETHING DEEP INSIDE THE ENGINE IS WRONG.  HOPE THESE GUYS CAN FIND THIS PROBLEM.  I'LL KEEP YOU ADVISED.

FRANK