Picking up speed - Engine revs?

No hoarsepower when I accelerate and rpms stay at 1500

I have a 2000 pontiac grand prix. 3.8L V6 supercharged. When the car is idiling in park the engine will rev up on its own. I have no idea what would cause that. I was told the vacuum line could be a problem. There was a hole in the line but I spliced it and fixed the hole. It still continues to rev up though. Any ideas why? Thanks

Could be plugged convertor, fuel pump, mass air flow sensor, check this link to assist you, so we can better assist you: https://www.2carpros.com/articles/engine-has-low-power-output

My Grand Prix GT (3800 series) has started "surging" when I am on the highway. The car has 145,000 KM (not miles) on it. This "surging" ONLY happens on the highway. I will be driving along on the highway and the car will surge (almost like someone is stepping on the gas or like the car can't find the gear it wants to be in) and my RPM's will jump up and down (usually between 2000 & 2500 rpm). This has been happening for a couple of months now and yesterday my check engine light came on. Any thoughts as to what could be the problem?

2000 Grand Prix GT 3.8L 3800 series with 166, 000 km's; car works great.

The RPM will quickly osscillate by 200rpm up and down. This happens anywhere between 1500 and 2500 RPM from 30 to 100 km/h. Most often when goin uphill at lower speeds.

Thanks for anyhelp anyone can give

2000 Pontiac Grand Prix GT - 3.8L V6 - 125000km, when I am driving between 60 and 90km/hr and going up a hill the RPM's drop between 500-1000 when trying to keep my speed constant, if I step on the gas a little, it will accelerate it goes away. It has been getting worse over the last few months and happening on flat roads now. I have had it tuned recently and my garage cant figure it out. Any ideas on how to fix this would be greatly appreciated.

Sorry, when I said the RPMs drop, it drops and jumps back up quickly over and over until the road flattens out or I step on the gas. Thanks

Hi,
I hope you managed to find an answer for your problem, because I'm facing exactly the same problem. I have Audi TT Turbo, Model 2004. As you said, this problem keeps getting worse. I'm really worried by now and I hope it will not lead to a bigger problem.

Appreciate your help.

Tareq

Any chance somebody helps me? I really need an answer. I'm about to change the turbo charger along with the complete exhaust system. But I'm not really sure if that will resolve the issue.

Thanks in advance.
Tareq

I got a 1999 pontiac grand prix se v6 3.1L wth 181k miles. Recently after a overheating problem the carb begn to have problems. At times when I start the car the RPM with just jump to about 1500 and stay there without me pressing the gas and will stay high whether in par, reverse, or drive. I turn the car off and on until it settles aruind 700-800 rpm and then it drives decently but at times will start increasing as Im driving.
Another problem, which is spontaineous but persistant, is if I give the car gas and hit over 2500 rpm it will begin to sputter and drive rough. I tune up te car regularly every 3-5k miles. I was thinking it may be te knock sensor but thought I'd ask the experts. Thanks, John.

The check engine light is on but due to the fuel level indicator not working properly awhile back. At times when the engine is hesitating while driving the check engine light will blink on and off for a few seconds or until the hesiation goes away. I have not checked for vacumm leaks or fuel pump pressure but I can look into it. Thanks for the fast response, John.

I have a 1998 Pontiac GTP (Supercharged 3.8L). My car has been idling at 1500 RPM, usually, once it warms up a little, this will go away. Recently, however, it has gone up to 2000. If I put the car into drive at this high RPM's, it slams into gear very hard and sometimes the wheels skid and the car jumps. When driving down the road, I have to drive with the brakes on because the car will idle at 48 mph. I also have other problems like the car will cut out and then start back up when accelerating. I thought it was the fuel filter, but we fixed that and it is not. I have replace spark plugs, filters, checked vacuum connections. It is not throwing out a Check Engine light, so I can't connect it to a computer to find the answer. Thought you may have some idea. This is really getting serious.

My car makes revving noises whenever I change speeds and whenever I turn to the left especially. The car doesn't want to go up hills at all, and appears to fall back into neutral when I come to a stop (but not all the time), but if I wait a few seconds it will usually go back on it's own. It has also stalled out on me a couple of times at stop lights. Once I get the car to a constant speed and stay there it is fine, but it revs whenever I try to go faster. Any ideas?