Out of answers

Subject: Out of answers Sun Oct 11, 2009 5:47 pm

While driving I try to speed up to 70 mph on the freeway, if I punch the gas the car may stall and do nothing.I have to let off the gas then press down slowly on the gas in order to speed up. 95 Rivi S/C Any thoughts?

Subject: Re: Out of answers Sun Oct 11, 2009 5:54 pm

If you have not already done so....replace the fuel filter. And maybe pour a bottle of HEET in the tank in case you have a tiny bit of water in your fuel.

Bert tavis

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99 Riviera(on the left)
"Cruising Missile"
Midnight Blue Pearl
90,000 miles
GuttedAirBox

70GS455(on the right)
Diplomat Blue
"Howitzer with windshield wipers"

Subject: Re: Out of answers Sun Oct 11, 2009 5:58 pm

i had a similar problem. it came down to defective coil. my car didnt stall though,it just had no guts on acceleration...

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95 riviera wht s/c...mods are in the works...mildly ported heads,manifolds and intake manifold. bilstein rear conversion. CCS custom springs.lowered 1". 160 stat.and a whole bunch of other s..t that i have to get out of my brain and onto the car.

Subject: Re: Out of answers Sun Oct 11, 2009 6:05 pm

ibmoses wrote:

If you have not already done so....replace the fuel filter. And maybe pour a bottle of HEET in the tank in case you have a tiny bit of water in your fuel.

Bert tavis

I agree with Bert on changing your fuel filter. It's inexpensive enough to rule that out as a possible area for fuel restriction.
I change mine once per year as preventive maintenance.

No need for HEET or any other gas additives that contain alcohol if the gasoline in your area already has Methanol in it. In our area you can only buy gas that contains 10% Methanol. This is all the alcohol you need to suspend water in your fuel.
If you don't have methanol in your gas then you can add a gas line anti-freeze.

_________________
98 Riv, 102K Miles, EBC, LS1 Ft.Calipers, STB, Addco Rr Sway Bar, 180* stat., SSAC Headers, HF Cat, 1.9's,
105# springs, MPS 3.4, DHP tuned by the Deekster.

Subject: Re: Out of answers Sun Oct 11, 2009 6:44 pm

Does it shudder at all? Is your check engine light on? Perhaps a bad TPS? Does it shift normally?

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'98 Buick Riviera; Gen V 3.25 pulley, N*, VS Cam, 180 stat, Custom PCM (Powrtuner), headers & HF cat , 42.5 lb inj.

Grant-built/PRJ/Thrasher trans 3.29 gears, 7/8 chain, zzp hardened IS

Subject: Re: Out of answers Sun Oct 11, 2009 9:31 pm

Rickw wrote:

No need for HEET or any other gas additives that contain alcohol if the gasoline in your area already has Methanol in it. In our area you can only buy gas that contains 10% Methanol. This is all the alcohol you need to suspend water in your fuel.
If you don't have methanol in your gas then you can add a gas line anti-freeze.

Never heard of Methanol in gas. Ethanol yes. That additive made from corn. Tends to clog up fuel filters a lot. I also change my filter once a year. You also might want to check all your fuel lines and and rubber hoses on those lines. My co-worker had an issue like this and as soon as he would push the gas the rubber hose would suck shut and shut down the engine from it.

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Drive Fast With Class.
'88 Rivi T-type Coupe 25th Anniversary two toned Pearl and Burgundy

Subject: Re: Out of answers Mon Oct 12, 2009 8:55 am

Wolfmaster579 wrote:

You also might want to check all your fuel lines and and rubber hoses on those lines. My co-worker had an issue like this and as soon as he would push the gas the rubber hose would suck shut and shut down the engine from it.

they don't use many rubber hoses anymore, mostly plastic-nylon tubing. They are known for splitting from time to time, but the rubber lines are mostly a thing of the past.

Our '69 and '73 still has those issues though, I have to replace the rubber lines frequently in them.

_________________
'98 Buick Riviera; Gen V 3.25 pulley, N*, VS Cam, 180 stat, Custom PCM (Powrtuner), headers & HF cat , 42.5 lb inj.

Grant-built/PRJ/Thrasher trans 3.29 gears, 7/8 chain, zzp hardened IS

Subject: Re: Out of answers Mon Oct 12, 2009 9:26 am

How many miles are on the engine, and when was the last time you replaced spark plugs and ignition wires?

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Subject: Re: Out of answers Mon Oct 12, 2009 10:23 am

Wolfmaster579 wrote:

Rickw wrote:

No need for HEET or any other gas additives that contain alcohol if the gasoline in your area already has Methanol in it. In our area you can only buy gas that contains 10% Methanol. This is all the alcohol you need to suspend water in your fuel.
If you don't have methanol in your gas then you can add a gas line anti-freeze.

Never heard of Methanol in gas. Ethanol yes. That additive made from corn. Tends to clog up fuel filters a lot. I also change my filter once a year. You also might want to check all your fuel lines and and rubber hoses on those lines. My co-worker had an issue like this and as soon as he would push the gas the rubber hose would suck shut and shut down the engine from it.

Yes, you are correct, I meant Ethenol not methenol, Sorry for any confusion.

_________________
98 Riv, 102K Miles, EBC, LS1 Ft.Calipers, STB, Addco Rr Sway Bar, 180* stat., SSAC Headers, HF Cat, 1.9's,
105# springs, MPS 3.4, DHP tuned by the Deekster.

Subject: Re: Out of answers Tue Oct 13, 2009 7:40 am

Ok first more info, the engin is a swop along with the trans.The spark plugs and ignition wires are new. So as far as mileage I don't know truly.If I try to ecellerate out the gate it will choke and I have to let off the gas. When it finally get to around 50 it changes gears and starts to shutter and steddyaround 65mph.Even at high speeds I cant punch it because it will choke and decrease in speed. The trans does not slip, infact it has excellent highway mileage. I will change the fuel filter today and let you know the out come.

Subject: Re: Out of answers Tue Oct 13, 2009 7:43 am

Have you double checked all your vacuum lines.
Engine and Trans. Make sure you have no vacuum leaks and that they are routed correctly.

_________________
98 Riv, 102K Miles, EBC, LS1 Ft.Calipers, STB, Addco Rr Sway Bar, 180* stat., SSAC Headers, HF Cat, 1.9's,
105# springs, MPS 3.4, DHP tuned by the Deekster.

Subject: Re: Out of answers Tue Oct 13, 2009 9:18 am

I agree about the vacuum leaks. Sounds like a vacuum leak or unplugged sensor. Do you have a SES light?

_________________
'98 Buick Riviera; Gen V 3.25 pulley, N*, VS Cam, 180 stat, Custom PCM (Powrtuner), headers & HF cat , 42.5 lb inj.

Grant-built/PRJ/Thrasher trans 3.29 gears, 7/8 chain, zzp hardened IS

Subject: Re: Out of answers Tue Oct 13, 2009 7:29 pm

I agree on two counts - vacuum leaks or ignition coils and/or module. The shuddering is typically because of bad spark, be it from the module, coils, wires, or plugs.

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1995 Riviera - Dark Cherry/Burgundy, 112,600 miles, Supercharged, Opened air box with K&N drop in, vac/boost gauge...
1988 Lesabre T-type - Garnet Red/Black, 117,200 miles, FWI, 3" Flowmaster exhaust, Delco II ignition swap, hood louvers...

Subject: Re: Out of answers Tue Oct 13, 2009 7:52 pm

Throttle position sensor is my guess.

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1995 Buick Riviera Naturally Ass-pirated.
I love this car, and my grandma is sooo jealous.