Grand Prix :: 1999 Pontiac - Temp Gauge Will Float Up And Down After About Five Minutes Of Drive
Nov 21, 2014
I have a 1999 Pontiac Grand Prix. The needle on the temp gauge will float up and down after about five mins. of drive time...after a short period of time, however, it will settle around 200 degrees or so. (The heater will not blow warm air while the needle is floating.) The only time the needle starts to rise is when the vehicle is stopped in traffic, but even then, it never gets into the "red." The car never overheats and I have yet to see any coolant on the driveway.
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I have a 2004 Grand Prix and it is displaying the symptoms of overheating but the temp gauge is not going above normal operating temp. I replaced the thermostat twice, and after driving for about 10-20 mins coolant comes out of the overflow. I'm at a loss, I'm thinking temp sensor(?) But I don't want to keep throwing unnecessary money into it. The fans work fine, the heater blows as it should.
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With summer heating up so is the engine. Temp stays normal at freeway speeds but as soon as I hit stop and go traffic it shoots up. Water pump is two years old. I flushed the radiator and didn't get much gunk out. Both fans are running when the AC is on. If I shut the car off but leave the key on the fans do not run when the car is not. I can't remember if they used to or not.
2001 Pontiac Grand Prix 3.1
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One day, I was on the highway and my Pontiac's speed started dropping. I looked at the temperature gauge, and the temperature was really high. I flushed the coolant system, and changed the gasket. Also the mechanic said that the oil might be leaking after they changed the oil. I paid like $700 for something that has nothing to do with the problem (I paid for a spark plug, ignition wires, fuel filter, and an oxygen sensor). After they changed the oil, oil started leaking all over my driveway, which didn't happen before. It also looked like coolant was leaking out. None of this happened before I got my oil changed with these guys.
After I changed the gasket, the car was running smoothly. But today, the same thing happened again, and I don't know if it's the thermostat, or water pump, or oil leaking, or coolant. The mechanic always suggests to fix something that doesn't have to do with the problem. I don't have much money on hand, so I need to only fix what has to do with the temperature rising, and I need my car to run.
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Drove 28mi out to dinner and when leaving after, she wouldn't start. Took it to work in the morning, and it ran fine prior to that. It was 15degrees outside, added heat to the gastank thinking the fuel line was frozen. Tryed to fire on, but it would only idle briefly surging while doing so and die, like not enough gas. It did start after I held the key down during this surging process grinding the starter also, should have driven home, but I shut it off like a idiot, as a result, had to tow home. Noticed TCS OFF light was lite up while it was running, then I shut it off, TCS OFF LIGHT went away when I turned key back on to attempt a 2nd restart. After i did that, it wouldn't fire on again. Towed to my house, I do not hear the fuel pump trying to kick on when i turn on the key. Fuel system is dry. Cranked over next day and definitely no gas in the lines. Bled the fuel system, no fuel shot out. Have checked the fuse box and the one under the hood too. Replaced the fuel pump relay but still no go just (this blows)...
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I purchase my 05 GX470 last April,
Had the timing belt and water pump replaced as part of the deal. Lately in the cooler temperatures around the freezing point I've noticed that the temp gauge does not start to rise until I've driven about five minutes, longer if I go thru a drive thru and the truck is idling in the line up and the heater fan does not come on until I've driven about 10 minutes. The temp gauge takes about 15 -20 minutes of driving till it hits normal or half way on the scale. This seems longer than what I consider normal, at least for the heat to come on.
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When I turn the car off the key only goes to acc. If I wait a few minutes I can hear a clicking sound coming from the steering column I think. Then I can turn it off all the way.Whats causing this? and how do i fix it. My car is a pontiac Grand Prix 2002.
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The grand prix is stalling at different times when driving, I cleaned mass air flow sensor. still has same issue, car stalls and have to put in neutral and start while driving.
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I have a 2005 Pontiac Grand Prix V6 and for some reason my washer fluid sprayer just stopped working. Yes, the fluid is full...hahaa. So anyways, I checked the fuses and they seem to be ok. What I can check before tearing it apart or bringing it in? How do you know if the motor is bad? Where is the motor located in this car? The wipers are working fine, but it'd be nice to clean the windows.
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I have a 91 pontiac Grand Prix with a 3.1 and the car has NO leaks, however, I have noticed that the transmission fluid level go down and the engine oil goes up. My conclusion is that some how the tranny fluid is crossing over to the engine, is this possible? and if it is, how or where?
NOTE: my car has a tranny cooling line to the radiator but no engine oil cooling lines and the colant is clean. how is it possible?
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Where the fuse that controls oxygen sensors on a 1997 pontiac grand prix 3.8L engine? i read some where it is under hood fuse panel, but what is the marking for the fuse?
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I am getting a thumping noise from front tires,can't really tell which side? as i turn to left it seems to stops until i straighten wheels.
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We have a 2003 Grand Prix. For the last few years it has this intermittent problem. Sometimes it just won't start and occasionally it will die while stopped at an intersection. I did some digging online and found out what the likely culprit is, but do not know how to fix it. I already spent a lot of money for a mechanic to claim he fixed it, but didn't.
According to online sources [URL] .... the security system TDM is at fault. It stops recognizing the VATS transponder in the key and thinks the car is being stolen. So, it cuts the connection to the engine. Clearly a dangerous situation if you are driving. My 17 yo daughter recently got stuck in a very busy intersection.
The temporary fix is to turn the key to the on position without turning the engine, wait 10 minutes then try starting the car. This is supposed to reset the security system. Now this is starting to not work. Someone suggested bypassing or modulating the TDM signal by adding in a resistor. I really don't feel equipped to do this though. Another solution is to buy a bypass module.
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My 1999 Grand Prix GT has been having problems. Here's what it does:
*Turn the key, it cranks but wont turn over.
*Turn the key, it will turn over but dies immediately.
*Turn they key, it will idle smoothly for a few seconds - minutes and eventually die.
So far I have replaced my Fuel pump and filter.
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2002 Grand Prix, 3.8L na motor, 187K miles. It was running perfectly until 4 days ago. initially, odd gauge stuff and flashing air bag light, then very, very slight engine skip with the tach gauge flipping around. 2 days ago, harder than usual starts ( a couple of seconds cranking instead of instant starts ), 1 day go, longer cranking in the morning, worse stuttering at highway speed. Afternoon, very hard start, stuttering right away, and then it would hardly start and quit after seconds. Gauges flipping and relays buzzing under the dash.
I had it towed home. Moving the key to run I didn't hear the fuel pump running. Checked the pressure at the rail, zero pressure. I removed the relay and jumped it to run the pump at high pressure. Fuel pump ran, pressure was 50-60lbs. Reinserted the relay, tried to start it and no change. I couldn't hear the pump running. Removed the relay and jumped the pump again, left it running and tried starting the car. Also no start.
I'm thinking it may have something to do with the ignition switch, PK3 system, BCM or PCM although I'm not sure which way to go with testing. I'm going to re-check the fuel pump and then start taking ignition switch out.
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I just changed my fuel filter and now I am having issues with the idle/accelator. When I get the car going to a speed of 40mph for example, I let off the gas and the speed barely drops. Then when I went down a side street about 20 mph, I let off the gas and the car just kept going. The idle was initally high, but then dropped down to it's normal 800rpm.
The only thing I touched under the hood was releasing the pressure from the fuel pressure regulator before the fuel filter change. I just removed the idle control unit and cleaned it but that didn't work.
2001 Pontiac Grand Prix GT/3.8L
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I have a 97 GTP. When I am at idle, I get a very loud rattling noise coming from the drive belt area of the engine. The noise goes away when you rev the engine up, but returns immediately when idling. I removed the supercharger belt assembly, and then noise still occurs. This just started tonight out of the blue, and It is extremely loud.
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Having issues with there Grand AM over heating? I've got a 99 Grand AM SE , & it's over heating. I cannot drive it more then 5 minutes without it starting to over heat. I'm getting no where fast with this vehicle.
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Installing engine after complete rebuild. The starter will turn it over and break in oil was added. How can I verify oil is flowing when I turn it over (with no fuel or spark) to avoid a dry start?
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I have a oil leak that I can't seem to find the source of. The head gasket corner (driver side firewall corner) has oil on it. (3.8 SC). Or maybe the intake valley gaskets are leaking but it doesn't appear so (and the intake was done within the last 20k miles). The back side of the oil pan (toward rear of car) is wet and the oil seems to be dripping off the transmission pan somehow.
Another thing is the knock sensor between the block and transmission seems wet, not sure if the oil is coming from above that or not, would the knock sensor leak oil or coolant? (or nothing)...
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I have a 99' GTP with 199,000 miles. I drive the very bumpy roads of Chicago. Recently when I go over any small bump, large bump, or when I am going fast and break I get a knocking sound mostly out of the right rear wheel, a quieter knocking out of the left rear wheel. It just sounds like a dry knocking when you go over any little bump or inperfection in the road. I am assuming that it is the struts. I don't know if i can just replace the shock part for $50 something or if my problem needs to be solved by replacing the whole strut assembly which includes preassembled strut, coil spring, strut mount and strut bearing?
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