not sure but i do know Pontiac changed the design of the timing covers and water pumps in 1970 for cooling purposes,on the 400.but they didnt come out with the 455 till that year i believe.i know what your talking about because i made the mistake of puting a1970 timing cover on my 68 Bonneville and i have to change it back.if the timing covers are the same you can take the one off the 400 and use that but i don't know if they are the same.
Turn the pulley around on the shaft and see if that makes things fit better.You are correct the 455 was introduced in 1970. The 11 bolt water pump was introduced in 1969 to replace the 8 bolt previous pumps. You must change the timing cover and water pump together as the earlier and later styles will not work together. You would need the water pump, timing cover from the 1968 400. -Bonn-evil
Have vehicle scanned to determine the problem
I HAD A 1990 BONNEVILLE I HAD THE SAME PROBLEM WITH.IT TURNED OUT TO BE THE CRANK SENSOR.ITS BEHIND THE HARMONIC BALANCER. HOPE THIS HELPS
You could have a short from the controlls to the fan
This is an internal transmission problem and could have several causes. Transmission needs to be replaced or rebuilt. There are a good amount of used ones on the market for reasonable prices. Get one with a parts and labor warranty.
P0401 Exhaust Gas Recirculation Flow Insufficient Detected
I just had the same problem on my 99 bonnie I found a bad plug wire, so I replaced all the wires and plugs now runs grear now. Hope this helps.
I had this problem on a 94 Bonneville after we had fixed the brakes. After I disconnected the battery and reconnected the light went off and the dinging stopped. Not sure if this was related or just coincidence.
See the answer to 2000 Bonneville Neutral Safety Switch Location. Had the same problem and that was my fix. You can install a separate Start Button in the Starter circuit to start the car also.
Well luckily for you I'm working on a 2000 Bonneville non supercharged car right now. Same code... I can hear a hissing noise from the passenger side of the engine.... found the actual map sensor has come apart.... maybe this will be your problem. Good luck.
camshaft or crankshaft sensor, or fuel injector circuit problem! This is from the actron code scanner book.
Could be a broken belt in one of your radial tires. Have them "spin balanced" to see it this is the problem.
I had this problem with my 1994 Bonneville SE. would try checking the transmission fluid level(that was the problem with mine). If the transmission fluid level is where it's supposed to be then it could be that the transmission is going out or you may need to check the torque converter. I think that can also cause the problem.
The best place I've found to get your brakes replaced is the local muffler man. Any type of smaller garage in your area will be able to take care of your brake problem at a fraction of the cost of taking it to the Pontiac dealership.
heater fan problemI'm haveing the same prblem in my 1997 Bonneville and have been told after paying $80 for the diagnosis by the Pontiac service department that it is the fan motor that needs to be replaced. I believe that there is a sensor of some kind that is attached to the heater fan which has gone bad. I haven't replaced it yet but it cost around $50 to buy the fan so it's an easy fix if what the Pontiac service department said is true. Don't let them do it they will charge you around $250 for the same repair!
i have the same problem. do not waist any money on sensors, i have replaced all the sensors and wires, what it is, is the thing that shifts your transmission, your car is taking off in high gear, my car takes off really slow which is a 1992 Pontiac Bonneville SE, and do not drive it until it is fixed, or you will end up putting a new transmission in to it.
Had the problem with Bonneville not starting....turned out to be the security module. Your mechanic should be able to bypass the security module with a $15 part from Radio Shack. Pretty easy fix.
My 1993 Pontiac Bonneville does the same thing, my dad ran some diagonstics and thinks it's the EGR valve. He's replacing it for me, and I'll let ya know if it fixes the problem.
I just had that same problem..I took it in to have it fixed and they replaced the blower motor resistor and that seems to have fixed the problem
either you are not using correct thermostats,or putting them in upside down,or thermostat is NOT the problem
I have the same problem and I was told, by the dealer, that the fuel pump module isn't holding the correct pressure after a "warm soak" and needs to be replaced to the tune of $1,000.
the battery is flat or its to old
Check the outlet by plugging in a 12v accessory (radar, gps, phone charger). If it has power, then the problem is the lighter itself. The are only a few dollars.
There is a Technical Service Bulletin on this particular problem. Easy enough to look up. There is no air filter in this system,I own one.
sorry i cant answer that ? but just curious I have a 2003 Pontiac grand am se and the front brakes have to be replaced about every 7 months, are you haviing any problem like that with your car?
I have a 1995 Bonneville that did the same thing. Your problem is you have a bad crank angle sensor. When you run your car on the computer it will not show up, but that's what your problem is. I took mine to the dealership and it was replace, cost about $230, and it has not happened since. Been about two years since replaced.