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Old 08-18-2006, 10:51 PM   #51
V8Rumble
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Location: 39.84N 105.11W
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Car: '89 Trans Am GTA
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Forgive me if this has already been covered, it's a bit late, & I've just skimmed the last 20 or so posts... But...

Is your air dam still attached? (And not "flopping around"?) If your car's heating up even during highway driving, that's the 1st thing I'd look at.

Also - I inadvertently messed my cooling system up (two ways) when I removed my A/C - first, the switch no longer activates my fan, & second, removing the A/C condenser from in front of the radiator now allows air to escape around the sides of the radiator, instead of being forced through it.

Like I said, I'm not sure if any or all of the above has been covered, but if not, they should be pretty easy to check, & cheap to fix if one or more of them applies to you. (I'll probably be fixing mine tomorrow...)

Good luck!
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Old 12-03-2006, 12:21 AM   #52
1991ON20's
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Location: west jordan,Ut (03' to 07') MIAMI,FL now
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im having the same problem. 305 tbi to a 350 tbi.....
my radiator makes a sound "like puting droplets of water in a frying pan" ping ping ping, after u turn the car off. Also after u turn the heat on the car has problems keeping cool.

and whats up with the spark knock i get on the highway...i read the post about that.....but does that have anything to do with me still using the 305 tbi injectors? is the temp rising to high and im getting that UGLY spark knock with the high drops in RPMS?
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oh yeah the city and the highway temps get up around 220 then at a stand still my rpms get go UP and Down like a roller coaster while the temps get a little higher.
whats the deal america?

Last edited by 1991ON20's : 12-03-2006 at 12:22 AM. Reason: Automerged Doublepost
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Old 01-24-2007, 11:59 PM   #53
escort_ford84
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160 or 195

Ive been going threw some stickies and im fairly sure this question hasnt been asked. I have basically a stock 305 with a fairly large camshaft. I have been running a 160 thermostat. I do make my own chips and have all the temps to work with the 160. I got the camaro (1988) stock with tbi. Then it had 185 PSI cylinder pressure. Now with the camshaft, i now have 150 PSI. I am wondering if i would benefit from the 195 having lower cylinder pressure. I would think cylinder temps would be lower with the lower PSI. Im sure someone has done this before. I installed a new intake manifold today and i have both thermostats sitting here ready to go on. Thanks.
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how can i fix this ?

Last edited by escort_ford84 : 01-25-2007 at 12:03 AM. Reason: Automerged Doublepost
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Old 08-19-2007, 06:02 PM   #54
sean_francis21
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Re: --common cooling questions (READ BEFORE POSTING or your post WILL be deleted!!!!!

The air dam that you all are talking about, what does it look like? I have a black plastic thing but its curved on my 89 RS by buddy has an 86 and he has the black plastic actually looks like a dam straight up and down does that mean mine is missing since I have nothing protruding down???
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Old 03-15-2008, 01:46 AM   #55
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Car: 89 Iroc z
Engine: 305 tbi
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Re: question....

i just read the cts link, i got code 15 and a code 23? so i guess i need to replace the senser and code 23 is iat? does that mean the comp is goin crazy cause the temp is normal but the cts is sayin its majorly cold?

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Old 05-29-2008, 01:58 PM   #56
Jasper45
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Re: --common cooling questions (READ BEFORE POSTING or your post WILL be deleted!!!!!

K guys I'm new here and need help I bought a 92 Z28 and the guy has converted the TPI 305 to a TPI 350 it's having overheating issues, at an idle it will just keep getting hotter I don't think the fans are coming on when they should which is what temp? Should I wire in a manual fan switch? The thermostat is a new 160 should I go to 180? Hoses and radiator are good and the previous owner installed an edelbrock water pump what next?
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Old 06-08-2008, 11:07 PM   #57
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Re: --common cooling questions (READ BEFORE POSTING or your post WILL be deleted!!!!!

something I did to help cool in the summer and still let you have heat in the winter is splice a wire ti the green with white stripe on coolant fan switch wire run it to a toggle... then the other lead from the spst toggle run to ground then you flip the switch on fan turns on. flip the switch off fan runs when tep switch tells it too.
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