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Chevrolet (Geo) Prizm

1322 messages,  Last post on Dec 06, 2009 at 2:12 PM

You are in the Chevrolet (Geo) Prizm Forum. Your Hosts are pat & karens

What is this discussion about? Chevrolet Prizm, Geo Prizm, Sedan


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#944 of 1322
Re: 1990 Geo Prism Making Clicking Noise [froggy1966] by mt700a1
Oct 07, 2005 (10:45 am)
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Replying to: froggy1966 (Oct 05, 2005 5:32 am)

Coolant temp sensor sends signals to the fuel injector, I believe. And maybe to the temp gauge on the dash also.
 
Actual cooling is regulated by a mechanical device called thermostat. I never replaced one on Prizm so I am not sure exactly where it is, but if you carefully trace the path of the radiator hoses, you will find it.
  
I hope the "clicking sound" does not imply internal damages to the engine due to overheating... Thermostat should be less than $20, but excessive overheating can ruin the engine. Blown head gasket also results in overheating, but for $20 you should replace the thermostat and see what happens.
 
Good Luck,
M
#946 of 1322
99 Chevy Prizm Wont start, no fuel, no spark by deadprizm
Oct 07, 2005 (5:25 pm)
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OK, this vehicle ran flawlessly for 120000 miles then went to start it and no go. No spark, no fuel. Took the fuel line off and cranked, nothing. Checked for spark, nothing. Did the no fuel cause no spark or did the no spark cause no fuel? Where does one start. And... is the oil pressure switch involved in this or is that just after it is already running??? 4cyl, auto! HELP!!!!
#947 of 1322
Re: 1990 Geo Prism Making Clicking Noise [mt700a1] by froggy1966
Oct 11, 2005 (2:48 pm)
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Replying to: mt700a1 (Oct 07, 2005 10:45 am)

Well we replaced the coolant temp sensor, replaced the radiator, replaced the fuel injector, resealed the valve cover etc been replacing parts all week. Still clicking. Even had a friend check it who works on cars and still can't figure it out.
#948 of 1322
Re: 99 Chevy Prizm Wont start, no fuel, no spark [deadprizm] by mt700a1
Oct 11, 2005 (5:00 pm)
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Replying to: deadprizm (Oct 07, 2005 5:25 pm)

No spark and no fuel sounds like too much of a coincidence. One will not cause the other. Oil pressure cannot be measured unless the engine is running already I think...
I would start by checking all fuses. There may be some under hood as well. If you have a wiring diagram or just a fuse layout, look for a fuse that is shared by the affected components. It will be helpful to know what else is not working, such as radio, headlight, etc. 99 is too new to have a serious problem so I am thinking this is a fuse issue.
M
#949 of 1322
Re: 1990 Geo Prism Making Clicking Noise [froggy1966] by mt700a1
Oct 11, 2005 (5:04 pm)
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Replying to: froggy1966 (Oct 11, 2005 2:48 pm)

Your car has a thermostat AND a coolant temp sensor. They perform different functions. A malfunctioning thermostat can cause overheating. When a car overheats it can make knocking noise and of course it would not run right in general. I am not sure if your car makes noise only when abnormally hot.
 
0. Has the thermostat been replaced?
1. Does the car still overheat?
2. Does the clicking noise occur at all times?
3. Did you check for cracks in the exhause manifold? (this can cause ticking or clicking noise as well as loud exhaust noise in general)
 
This is not very likely but has anyone checked the valve adjusters? They are hydraulic type and when they fail they cause ticking noise.
M
#950 of 1322
Re: 1990 Geo Prism Making Clicking Noise [mt700a1] by froggy1966
Oct 12, 2005 (1:26 am)
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Replying to: mt700a1 (Oct 11, 2005 5:04 pm)

actually thermostat has been replaced too...the car isn't hot when it's clicking. Can turn it on and press on the gas and clicks and the more you push on the gas the louder it clicks. If you go into reverse it dies..go into drive and move it dies.
 
the exhaust is brand new and so is the transmission. Car was working great til a week ago. When you try to drive you can push your foot down on the gas and it doesn't want to accelerate. A friend makes custom parts for cars and works in a auto supply company and works on cars and he's been replacing parts left and right...the codes said fuel injector (#1) been replaced and still doesn't want to work.
#951 of 1322
Re: 1990 Geo Prism Making Clicking Noise [froggy1966] by mt700a1
Oct 14, 2005 (11:01 am)
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Replying to: froggy1966 (Oct 12, 2005 1:26 am)

I am puzzled.
 
Did you put gas in the car right before the problems started? If the gas station let the fuel level in their tank to too low, bad stuff could come out of the pump. It is unlikely but still a possibility.
 
Has the timing been checked? If the timing belt is loose and the belt skipped the teeth, the car won't run right. Symptoms of wrong timing would be loss of power and overheating. I would definitely check the timing if you haven't done so yet.
   
M
#952 of 1322
Re: 1990 Geo Prism Making Clicking Noise [froggy1966] by mt700a1
Oct 17, 2005 (9:41 am)
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Replying to: froggy1966 (Oct 12, 2005 1:26 am)

My previous comment refers to the valve timing, in which the timing belt plays a major role.
 
Ignition timing is timing for the spark plugs to fire, and it is not related to valve timing at all. It too can go out of adjustment, and "tuneup" service usually includes ignition timing check. You should have it checked as well.
 
Let me know how it goes.
M
#953 of 1322
Re: 1990 Geo Prism Making Clicking Noise [mt700a1] by gprior
Oct 19, 2005 (6:21 am)
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Replying to: mt700a1 (Oct 17, 2005 9:41 am)

Hi,
I have a Fiat Punto 1.2 8Valve and it has a similar problem.
It will overheat within about 15 mins of starting, but just before light comes on, it will make a clicking sound with the throttle, and the more throttle i give it, the louder it gets. If i'm off the throttle, then go on it, i hear a fast click a few times, then it stops a bit, like a slipping, clicking, hard to describe on here.
I am getting a new thermostat fitted, so leaving it at that for now but i'll let you know what happens. Mine only does it when it's getting hot though.
Hopefully this should solve problem, no hot air through vents, thats why we think it's the thermostat... or the water pump?

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