Hesitation and Sputtering - Page 3 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1987-1991 Parley with regards to your 1987 to 1991 Bonneville, Olds 88 or Buick Le Sabre Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 08-04-2005, 10:39 PM   #21
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Oh, "a lot of them" meant vacuum lines, not cracks. I see.

Possibly the TB gasket. The TB could most likely use a cleaning...
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Old 08-04-2005, 10:53 PM   #22
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jwikoff99
When I replaced the air filter I disconnected the rubber hose between the air cleaner container and the throttle body and sprayed carb cleaner in while I held the flap open. Alot of dirt, but when I reasembled everything, there was no change.

Does anyone have around $50,000 Canadian they can give me for a New Bonne?

This Bonne of mine is putting me to the test........grrrrrrr


Frank
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Old 08-04-2005, 11:20 PM   #23
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Oh boy. Carb cleaner on the MAF sensor is bad news.

When I said the TB could probably use a cleaning, I meant if you take it off to replace the gasket.

Please tell me it still runs.
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Old 08-05-2005, 12:30 AM   #24
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If you cannot find a fuel pressure test set, it can be made with a cheap 60-100 psi gauge, or even a dial type tire pressure gauge, but, you will need a #4 JIC female hydraulic fitting to connect to a hose connected to the gauge. You also have to remove the valve core from the fuel pressure tap to use this method. The fuel pressure test kit will be god investment and will generally work on several different model cars. It will take a lot more fuel to accelerate the engine, especially with a load on it. Each injector is only open a few milleseconds to idle the car but many times that "open" time when accelerating, and if the fuel system pressure, or volume, is very low, it will simply run out of fuel and then recover when slowing down. With the key on, the fuel pressure should jump to a little over 40 psi immediately, actually 43.5 psi is the target, but a little one way or the other won't matter. If the fuel rail was empty to start with, it may require turning the key off for 30 seconds or so and turning it back on to come up to full pressure. The pulsator I referred to is the factory installed item between the actual fuel pump and the fitting at the top of tank. I always discard this and replace it with fuel injection hose. I am almost certain this is installed to reduce fuel pump noise, but it is prone to leaking once it has been disconnected and reconnected. Almost all of the pumps I have installed came with a short section of hose to replace it.
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Old 08-05-2005, 12:17 PM   #25
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jwikoff99
I guess I'll never use carb cleaner in that way again, Thanks, and yes it still runs.
2seater
I guess my mission this weekend is to get a fuel pressure gauge and do the test. I have a bad feeling I bubba'd something when I re & re'd the furel pump. Oh boy, I hope I'm wrong and it'* something simpler than that.

Thanks for your input people......(don't know whether I should say guys....or rather gals........so I left myself politically safe by saying "people")


Frank
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Old 08-05-2005, 02:03 PM   #26
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Quote:
Originally Posted by jwikoff99
Oh boy. Carb cleaner on the MAF sensor is bad news.

When I said the TB could probably use a cleaning, I meant if you take it off to replace the gasket.

Please tell me it still runs.
I've cleaned and heard of many dealers using TB cleaner w/o hurting a MAF
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Old 08-05-2005, 02:40 PM   #27
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Well, he used carb cleaner. Maybe that'* more harmful to a MAF?

And just for the record, I'm a man.
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Old 08-05-2005, 02:41 PM   #28
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TB cleaner is supposed to be sensor safe.

Carbs don't usually have sensors.
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Old 08-05-2005, 03:03 PM   #29
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jwikoff99
TB cleaner is supposed to be sensor safe
I used carb cleaner, but hey I didn't harm anything.

theJMFC
And just for the record, I'm a man
I've always heard you were "The Man"

BillBoost37
I've cleaned and heard of many dealers using TB cleaner w/o hurting a MAF
I promise I won't do it again just to stop the argument. Promise!

Guys

Please help me get this car running well again before Monday.


PLEASE!
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Old 08-05-2005, 03:08 PM   #30
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What is it you can spray around gaskets while the engine is idling? If there is a leak in the gasket, the idle will change. Is it ether, or something else?
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