Sputtering a little…. 45-60MPH - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 01-18-2006, 12:03 PM   #1
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Default Sputtering a little…. 45-60MPH

94 Bonneville SE 150,000miles

When im going about 45-60MPH and the tork converter locks and give it a little more gas to get up a hill it sputters a little like its misfiring or the timing changed.

I just got the car last week and I think the plugs and wires are the original ones on the car.
Im thinking maybe that’* the problem or maybe a throttle position sensor.

Any ideas on what might be the problem???..
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Old 01-18-2006, 12:13 PM   #2
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Once the torque converter locks you will feel any ignition problems that exist.

if the plugs and wires are on your list of items..change them and go from there.
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Old 01-18-2006, 12:17 PM   #3
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yup thats one of the things i was going to do ASPS when the its not that could and raning/snowing out up here in rochester,NY

But i just wanted to check to make shure i wasn't going down the wrong road with this, i dont know alot about the Bonnetvilles yet,
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Old 01-18-2006, 12:19 PM   #4
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Default Re: Sputtering a little…. 40-50MPH

Quote:
Originally Posted by bandit
94 Bonneville SE 150,000miles

When im going about 40-50MPH and the tork converter locks and give it a little more gas to get up a hill it sputters a little like its misfiring or the timing changed.

I just got the car last week and I think the plugs and wires are the original ones on the car.
Im thinking maybe that’* the problem or maybe a throttle position sensor.

Any ideas on what might be the problem???..
well it isnt your throttle position sensor cause i just changed one of those and your cars rpms would be of the wall when sitting at a stop light or in N or P the tach would spool up

and it might be your spark plugs

one way to find out is at night when there is a little bit of light left take your car open the hood (while engine is running) take a pair of heat gloves and put them on and then one buy on remove each spark plug carefully make sure though that you keep in close enough that it makes purple or electric current

for your fuel injectors( that is probablly your most likely fix) take out the fuel injector rack and find out if there is any bad ones and if there is replace them and put the rack back on

do try these and tell me what happens
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Old 01-18-2006, 12:21 PM   #5
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bandit...do the easy stuff first. 90% of the time, what you're experiencing is ignition related. If that doesn't work, we'll address other things. For now, pick up a nice set of plugs and wires. Preferably AC Delco.
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Old 01-18-2006, 12:24 PM   #6
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yea and that other 10% usually rears its ugly head after u fix something that wasnt broke so

take your time when repairing your car
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Old 01-18-2006, 12:24 PM   #7
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Default Re: Sputtering a little…. 40-50MPH

Quote:
Originally Posted by wakefieldl
one way to find out is at night when there is a little bit of light left take your car open the hood (while engine is running) take a pair of heat gloves and put them on and then one buy on remove each spark plug carefully make sure though that you keep in close enough that it makes purple or electric current

for your fuel injectors( that is probablly your most likely fix) take out the fuel injector rack and find out if there is any bad ones and if there is replace them and put the rack back on

do try these and tell me what happens
I would not recommend touching plugs, wires or any ignition related components with the car running or in the on position. The voltage is very high and can cause you serious injury.

Lucas: he does not mention injectors in his post. The injectors are most likely fine and do not need to be removed. If anything a bottle of injector cleaner run through the fuel system when changing the plugs and wires would be a good idea.
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Old 01-18-2006, 12:59 PM   #8
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Quote:
Originally Posted by BillBoost37
Once the torque converter locks you will feel any ignition problems that exist.

if the plugs and wires are on your list of items..change them and go from there.
I had something similar on 93 LeSabre after 70-80K. I replaced plugs and wires with GM OEM wires and still had a little uneveness right at the bottom of the lockup Torque converter range. I found there was a prom update at the dealer for that. All it did was delay the lockup speed so the engine is turning faster and you don't feel the uneveness from normal operation or EGR or whatever caused it. I had to pay for the new PROM.

I learned then that later cars had the 4T65E instead of 4T60 and those torque converters didn't lockup 100%. Instead they had a slip factor that is variable so that you don't feel the motor'* vibrations and don't feel the engagements.
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Old 01-18-2006, 01:25 PM   #9
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If his car has 150,000 on it and it looks like the plugs and wires are original, he can't go wrong replacing them first. They NEED it! Just make sure to use good plugs and wires.

Before trying to get into a problem diagnosis, it'* always good to review the tune up status of your car. Never underestimate the value of a good thorough tune up. Like it says in the tech section.

The very least you will accomplish will be to eliminate those items as sources of any problem.
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Old 01-18-2006, 02:22 PM   #10
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Welcome. Loving the weather here in rochester as well. i would also suggest checking/changing the Plugs and wires first.

After that, if it doesn't change we can start looking at other things.

Where abouts are you in Rochester? There are several members from this area, myself being one of them. I live in the Cobb'* Hill neighborhood of the city, just off Monroe ave. Another member Rob live on RIT'* campus. Both of us have a decent amount of knowledge and I also have the 1993 Service manuals here that might help us diagnose it further (L27 should be the same/similar enough for 93/94) I will be out of town this weekend, but would be willing to help in the evenings this coming week. Let me know.
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