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Sedans Pontiac Bonneville Pontiac Bonneville Engine Surging Problems
22 messages, Last post on Nov 20, 2009 at 7:30 PM
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| what are the voltage readings for 1992 SSEi, I,m checking the readings to determine if the tps is no good.thanks | |
| Here it is..I have an 03' Bonneville SE and when I put it in reverse (only when it is not hot) it surges a lot. It doesn't surge in RPM's but you can really feel it surging in the engine. It will also do it when i am driving around 40ish and keep it at 1500. I was told that it probably wasn't tranny failure per se because once the car is warm it doesn't do this. I'm just looking for some answers. | |
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I have a 98 bonneville, I just replaced the upper intake over the weekend, But now while at a stop light my car surges, If i shift to N, the surging stops somewhat, Is there something I missed while changing this out. Has anyone had this problem.
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Replying to: asosocargirl (Dec 30, 2008 9:02 am) You may have to clean your MAF or IAC if you didn't do that while the throttle body was off. Check your screws holding down the UIM but don't overtighten them. They're supposed to be some low amount of inch-pounds--I'm thinking near 90 but don't trust my number. Did you put both o-rings on the PCV valve. One at the top and one on the bottom. If not it sucks a lot of air from the crankcase. With the motor running take off the oil filler cap and see if you're getting a noticeable large volume of air flow. |
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Replying to: brumby (Mar 21, 2007 7:22 am) I found out it had a leaking lower intake manifold gasket. When boost was positive, oil, water and air could leak out slightly, due to the pressure, confusing the engine control module. Fixed the gasket and the surge went away ! |
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I have a 2000 Bonneville with 130k miles the last couple of months it started this surging thing when on the highway at speeds of 75 mph it feels like I have ran over something in the road but there is nothing there. The problem comes and goes with no apparent pattern I'm not sure if i would call it a surge or a drop in rpm but it is very fast, fast enough I dont loose any speed sometimes it will do it a couple times in a row and is getting progressively more frequent. I put about 60 miles on this car a day. There is no code coming up in the computer, but the service engine light has come on a couple of times but of course goes off by the time I get to the shop. I have heard that it may the the mass air flow sensor or possible the fuel pump the techs i have talked to think that it is the transmittion but sometimes the car will do this at idle as well it comes really close to dying but revs right back up. I have looked at the mass air flow sensor and there doesn't seem to be any dust or anything on it any ideas? A new mass air flow sensor is $150  . As to any more clues I can provide the only other thing i can think or is that most of my gauges seem to not work very well or be slow. The oil pressure gauge only moves a little bit when throttle is applied and is always above 40 and the fuel gauge doesn't work very well ether I put $10 of fuel in the other day at empty and it said i had over half a tank which i know to be wrong. Any feed back would be helpful THX
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I have a 2001 Bonneville and I have been having a tough time trying to figure it out. In the mornings when I start it when it is 50 -55 deg, by the time I get 1/2 mile away from home, it starts to surge and backfire with no acceleration. If I park it and let it warm up, it runs fine the rest of the day including when I go home in the afternoon. It has done this 5 or 6 times already and all have been in the morning when it hasn't been run in 10-12 hours. My local shop hasn't been able to figure it out, they have replace the crank & cam sensors along with the ignition module with no luck. A couple of times it has gotten so bad it had quit and I haven't been able to re-start the car for a couple of hours, but when it does restart it runs fine. Any help would be appreciated.
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Replying to: kyle120 (Jul 01, 2009 4:12 pm) I have similar issues with my 99 pont. Bonn sse, no turbo. 140k miles I have changed plugs, wires, o2, tbs, and even went as far as replacing valve seals in the motor. It runs ok, starts every morning gets me to point Ato B no problem, but does surge (misfire, buck, lack of power), and I notice this happens when I try to accelerate on a on ramp around 35-45mph ( I can hear a clicking ping sound almost like its coming from the exhaust) and when my cruise control is on 70, its surging( bucking, loss of power) more often now. I am burning oil, but not leaking anything, this is driving me nuts. I have talked with a few techs, and one was telling me that the exhaust system gets clogged which can cause these issues. My engine light is on, the code is for cylinder 6 mis firing, now when I pulled out the spark plug , its bad, really bad, corroded burned out (it only had 10k miles on it). Another thing I noticed is, I replaced my oil cap with an after market brand that dosent seem to fit perfect, maybe this is my issue, yeh right, but a 3 dollar part sure beats an engine rebuild. I love this car and dont want another car payment at this point in my life. next time this happens im going to hit the brake and gas at the same time to see if it stops, also will try driving in 3rd gear to feel if it stops. Wondering if maybe I have a few issues, clogged exhaust, bad gasket (wishful thinking) or does it sound like the motor needs rebuilt?? Any help would be greatly appreciated. Thanks Dan |
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Replying to: jhardy3 (Sep 15, 2009 11:50 am) My car did the same thing, it started out this way, after about a year it got worse. These are my symptoms 1. engine light on (cylinder 6 misfire) 2 more I need to look up 2. excessive smoke out of exhaust 3. burning oil, not leaking, I dont see anything on the ground (a quart every 2wks) 4. 3rd gear still hesitates, also when I try brake and gas  same time, still hesitates, Its now hesitating in neutral after I start up in the morning. 5. started out hesitating only a couple of times, progressively is getting worse after a yr. 6. spark plugs are shot after only 20k, in cylinder 6, I will check the other ones 7. I have tried several after market products (slick 50) when I change the oil, helps a little bit 8. I have cleaned and tightened up my battery connections, they needed it 9. Oil cap, is a aftermarket, that dosent seem to fit tight. 10.I haven't noticed if it hesitates when Im in reverse, dont go fast enough 11. I also can hear a pinging noise ( on rare occasions) when trying to accelerate on a on ramp, like a piston ring going bad, but it seems like its coming from the exhaust. I have done all routine maintanence, plugs, wires, sensors (map, o2) I believe from everything I have read its the lower intake manifold gasket leaking, finally causing the control sensor to go nuts which would explain the surging, the oil burning, plugs going bad, slick 50 helping a little bit. I think the exhaust is also finally backed up or clogged somewhere. I will try to get it done in the next couple of days and post the results. Thanks for everyone help on this one Dan |
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