QuestionQUESTION: I have a 1992 Bonneville 3.8 non supercharged. it has roughly 140k miles on it. when driving down the road at about 45 mph and around 1.5k RPMs it feels like it is missing. It only does this when u are light on the gas or you are just driving at a normal Speed. Cruise will even do this. any guesses to what may be the problem. "just replaced o2 sensor plugs wires" Thanks
ANSWER: Hi Dylan:
What year is this? 92 or 94? It makes a difference.
You more then likley have an issue called a TCC chuggle which is under a light accel you feel the engine pulses when the torque converter cluth is applied. If it's indeed a 94 there is a different prom (mem-cal) for the engine computer it rises the TCC apply speed and changes a few other things so it is less noticable. In a nut shell what is going on is it's a lean misfire and you feel it when the tcc is applied. was this here prior to changing all the parts chasing this condition or did it crop up after? Use ONLY AC DELCO spark plugs in any GM car/truck. when was the last time the fuel filter was replaced? you may also want to try a couple of bottles of a fuel system cleaner called Chevron Techron. it works fantastic if you have a restricted injetor. You can get it at Wal*mart cheaply. as for the Mam-cal for 94 bonneville You may not even be able to get that due to the fact that the car is almost 20 years old :(. Good luck
---------- FOLLOW-UP ----------
QUESTION: it is in fact a 94. It was doing it prior to the Spark plug change and i did change the fuel filter ive also ran some Sea-foam but ill try some chevron.
Answergive it a try. If is still does it this is the bulletin I was refering to. Again good luck with trying to find the parts on an almost 20 year old car.
37-65-17A: CHUGGLE AT 36 MPH & ABOVE WITH TORQUE CONVERTER CLUTCH - (Aug 1, 1994)
REVISION: 07/20/94
THIS BULLETIN REVISES THE APPLICABLE MODEL YEARS TO INCLUDE 1994 AND PROVIDES 1994 PART NUMBER INFORMATION. PLEASE DISCARD BULLETIN 376517 (GROUP REFERENCE 6E - ENGINE FUEL& EMISSION). ----------------------------------------------------------------------
SUBJECT: CHUGGLE AT 36 MPH AND ABOVE WITH TORQUE CONVERTER CLUTCH ENGAGED (INSTALL NEW MEM-CAL)
MODELS: 1993-94 BUICK LESABRE, PARK AVENUE AND REGAL 1993-94 CHEVROLET LUMINA APV 1993-94 OLDSMOBILE 88 ROYALE, 98 REGENCY AND SILHOUETTE 1993-94 PONTIAC BONNEVILLE AND TRANS SPORT WITH 3800 ENGINE (VIN L - RPO L27)
CONDITION:
SOME OWNERS MAY EXPERIENCE A CONDITION DESCRIBED AS A "MISS," "SKIP," "CHUGGLE," "HESITATION," OR "FISH BITE" SENSATION WHILE DRIVING THE VEHICLE AT 36 MPH AND ABOVE.
CAUSE:
WITH THE TCC ENGAGED, ANY POWERTRAIN OR VEHICLE ROTATING DISTURBANCE IS TRANSMITTED TO THE PASSENGER COMPARTMENT. REFER TO NOTE 3 UNDER THE HEADING "CORRECTION."
CORRECTION:
IF THE TECHNICIAN DETERMINES NO OTHER CONDITIONS ARE CAUSING THE CONCERN, AS OUTLINED IN SECTION 6E3-B IN THE APPROPRIATE SERVICE MANUAL, A SERVICE MEM-CAL IS AVAILABLE TO ONLY RAISE THE THIRD GEAR TCC LOCK FROM 36 TO 50 MPH AND FOURTH GEAR TCC LOCK FROM 45 TO 54 MPH. NO OTHER DRIVEABILITY ISSUES ARE ADDRESSED WITH THIS MEM-CAL.
NOTE 1 THE REVISED MEM-CALS ARE NOT CONSIDERED A 100 PERCENT CURE, HOWEVER, MOST CUSTOMERS DO NOT PERCEIVE THE "CHUGGLE" OR "FISH BITE" SENSATION WITH THE HIGHER TCC LOCK UP SPEEDS.
NOTE 2 THE REVISED MEM-CALS MAY ADVERSELY AFFECT FUEL ECONOMY (USUALLY LESS THAN ONE MPG DEPENDING ON INDIVIDUAL DRIVING HABITS). BE SURE TO ADVISE THE VEHICLE OWNER OF THIS FACT.
NOTE 3 CHUGGLE MAY ALSO BE CAUSED BY OTHER CONDITIONS, FOR EXAMPLE, OUT-OF-BALANCE TIRES, OUT-OF-ROUND TIRES, ENGINE MISS DUE TO IGNITION RELATED COMPONENTS OR A MECHANICAL FAILURE, A/C COMPRESSOR CYCLING, TCC MALFUNCTIONS CAUSING EXCESSIVE SLIP VALUES AS MEASURED WITH A TECH 1, AND SPECIFIC ROAD SURFACE CONDITIONS.
SERVICE INFORMATION:
USE THE PROCEDURE IN SECTION 6E3 IN THE SERVICE MANUAL FOR MEM-CAL REPLACEMENT. THERE HAVE BEEN NO CHANGES IN THE REMOVAL AND INSTALLATION PROCEDURE.
PARTS INFORMATION:
1993 MODEL YEAR APPLICATIONS
SERVICE B/C MEM-CAL MEM-CAL CODE ID AXLE EMIS. MARKETING DIVISIONS ------- ---- ------- ---- ----- ------------------- "CB" CHUGGLE MEM-CAL - BUICK PARK AVENUE AND OLDS 98 REGENCY -------------------- 16202846 BKTH 2874 2.84 FED. BUICK, OLDSMOBILE 16202856 BKTJ 2884 2.84 CALIF. BUICK, OLDSMOBILE 16202861 BKTK 2894 3.06 FED. BUICK, OLDSMOBILE 16202865 BKTL 2904 3.06 CALIF. BUICK, OLDSMOBILE 16202868 BKTM 2914 3.06/16" WHEEL FED. OLDSMOBILE 16202872 BKTN 2924 3.06/16" WHEEL CALIF. OLDSMOBILE
"HB" CHUGGLE MEM-CAL - BUICK LESABRE, OLDS 88 ROYALE, PONT. BONNEVILLE -------------------- 16202880 BKTP 2934 2.84 FED. BUICK, OLDS, PONTIAC 16202883 BKTR 2944 2.84 CALIF. BUICK, OLDS, PONTIAC 16202887 BKTS 2954 3.06 FED. BUICK, OLDSMOBILE 16202891 BKTT 2964 3.06 CALIF. BUICK, OLDSMOBILE 16202895 BKTU 2974 3.06/16" WHEEL FED. OLDSMOBILE, PONTIAC 16202898 BKTW 2984 3.06/16" WHEEL CALIF. OLDSMOBILE, PONTIAC
"WB" CHUGGLE MEM-CAL - BUICK REGAL
16203286 BKXF 3254 3.06 FED. BUICK 16203289 BKXH 3264 3.06 CALIF. BUICK
"UB" CHUGGLE MEM-CAL - CHEVROLET LUMINA APV, OLDSMOBILE SILHOUETTE, -------------------- PONTIAC TRANS SPORT 16203670 BKXY 3644 3.06 NW CHEV., OLDS, PONTIAC
1994 MODEL YEAR APPLICATIONS
"CB" CHUGGLE MEM-CAL - BUICK PARK AVENUE, OLDSMOBILE 98 REGENCY
16202825 BKTB 2834 2.84 NW BUICK, OLDSMOBILE 16202816 BKSZ 2814 3.06 NW BUICK, OLDSMOBILE
"HB" CHUGGLE MEM-CAL - BUICK LESABRE, OLDSMOBILE 88 ROYALE, PONTIAC -------------------- BONNEVILLE SE 16202842 BKTF 2864 2.84 NW BUICK, OLDS, PONTIAC 16202828 BKTC 2844 3.06 NW BUICK, OLDS, PONTIAC 16202832 BKTD 2854 3.06/16" WHEEL NW PONTIAC
"WB" CHUGGLE MEM-CAL - BUICK REGAL
16203293 BKXJ 3274 3.06 NW BUICK
"UB" CHUGGLE MEM-CAL - CHEVROLET LUMINA APV, OLDS SILHOUETTE, PONTIAC -------------------- TRANS SPORT 16203681 BKYA 3664 3.06 NW CHEVROLET, OLDS, PONTIAC
PARTS FOR 1993 APPLICATIONS ARE CURRENTLY AVAILABLE FROM GMSPO. PARTS FOR 1994 APPLICATIONS ARE EXPECTED TO BE AVAILABLE FROM GMSPO ON JULY 11, 1994.
WARRANTY INFORMATION:
LABOR OPERATION: T0500 LABOR TIME: 0.6 HOURS
