My Car Is Bunny Hopping And Over Heating

[Seb,]

Hi, i just bought a 89 R32-gts-t which has some major heating issues.

I've already spent a bit having a full service done and a couple of other things to try and fix this very annoying problem, but before i go and throw some more money at it i thought i should ask what you guys think it is.

It basically is always over heating even in the cold morning after 5 minuets of driving i can feel the heat coming through the floor and after a little while it starts to lose power then get it back very quickly making it bunny hop, it mainly starts to do this as the boost pressure rises above 2 pounds, but some times this problem will come and then go away but it seems to be getting worse and happening more often, also sometimes if i slam it for a bit it will go away for 30 minutes or so,When i slow down to take a corner or sit at lights it will stall sometimes and when i start it, it will rev up to 2,000 revs then bum out to 500 revs and keep doing this over and over then stall again.

I've already flushed the radiator twice and replaced the thermostat but it's still doing it.

In the next few days I'm going to get the temperature sensor replaced in a effort to try and fix the problem, the temp gauge wont go above half way even when the motor is so hot it wont start so maybe that is why it is doing it, i dunno.

If anyone knows what this is and how to fix it please let me know.

[r33_racer]

Have you checked for any leaking hoses or loose piping. Maybe cracked vaccum lines or water hoses. Is the car losing coolant?

Checked ya plugs?

Checked ya coilpacks?

Fuel Pump?

Fuel Filter?

What was changed or done at last service?

[blind_elk]

Check the water pump - the fins have probably corroded away.

[drews32]

Check the water pump - the fins have probably corroded away.

<{POST_SNAPBACK}>

yep i agree. check and see if there is any leaking near the water pump.

Edited December 1, 2005 by drews32

[Seb,]

It did have a cracked hose that was leaking coolant but i got that fixed, i also replaced the temperature sensor just in case the computer was getting wrong signals, i had the computer checked for errors and it said there were non.

Yea the plugs got replaced at the service, The coil packs weren't touched in the service, But as for the fuel pump and fuel filter i didn't think to get them replaced, I'll get them done later in the week if you think it might fix it.

But as for the water pump i don't think there are any problems there because since i had the thermostat replaced i can see the coolant flowing through the radiator nicely.

Edited December 3, 2005 by Seb,

[Penfold]

Hmm,

How hot did it get when leaking coolant - check oil/water for no signs of head gasket damage.

[Seb,]

It was leaking near the firewall, but since i got it fixed i haven't noticed any change in performance or cooling, It's still running pretty hot.

The biggest problem besides all the things that have been happening, is that it doesn't always do it, So when i take it in to get it fixed there's nothing wrong with it.

Maybe the car is running lean and thats why it's over heating, Don't know how that could be because it go's through heaps of petrol, Just a thought.

I'm going back to the mechanics on Wednesday when i get payed, So what should i get done first?

Edited December 4, 2005 by Seb,

[Seb,]

Any one have any suggestions

[DriftSquad]

well my car has a similer problem.. it "bunny hops" as if the car was running outta fuel... i was told it is an AFM problem... im yet to fix it.. pm me if u want

[SuAvE-1]

Jeez man, I got a friend with a SR20 180, same problem as you describe. The biggest problem is when we take it to our mechanic, the car doesn't act up - mech thinks we're paranoid. I went to hook up my diagnostic computer and it didn't do it then either! I have a theory, there might be some crud in your fuel tank, because It always seems to happen when he is very low on fuel. Try filling up to the brim and see if it goes away.

If we fix the problem on the 180, I will try and remember to post it here.

[Josh]

Overheating R32's... how I loathe this problem...

Dude get the radiator core checked - This was the main culprit behind my overheating issues - it corroded from the inside out, hard to spot..

Also check your heater core - look for wet floor its a tell tale sign...

farked thermostat won't cause overheating - they rarely fail while they are closed.

Are you losing coolant each time??