help , my 89 rx7 non turbo is reving up and down up and down when cold...anyone know were i should look i??

 

pulsation damper?

 

Is it doing it only when you first start it up till the engine heats up or is it all the time. Could be the cold start assist.

 

I don't think the pulsation damper can cause this.

Does the problem go away if you play with the throttle a bit? Might be the TPS if so.

 

its that thermowax thing i think, give it a little rev of the gas when it happens, or start your car in 1st gear with clutch pressed in, this will bypass the cold start system, that might help you

 

yes it only dose it while its cold but it acts like its trying to flood at that time when i rev it up it will go away, but then i put it in drive and it comes back again but if i let it warm up it will run fine it has 95,000 miles on it and like i said it only dose it when cold...is there something i can do to stop it ??or can i unplug something to stop it ??
what would be a good way to fix it???....thanks

 

also would like info onwere i can find info on a few little mods that can be done to this 13b,auto trans,i know i know i need a 5 speed ,,i got it comming .
are there any low budget mods out there,maby some reprograming of the computer ?
no smog,or cat at this time .

 

get ur exhaust done.. and the problem with ur car is the TPS throttle position sensor its very easy 2 change u wont need a mechanic just gotta buy the sensor its probobaly around 75 for a rebuilt 1.. the mazda dealer charges 540 for a brand new 1 lol

 

thanks guys for your input

 

my car does that when it gets near freezing outside.

it's just the TPS, though. you either need to adjust it, or you need to replace it.

try adjusting it first. very simple fix.

 

ok thanks ,im new to the rx7 so i have a lot to learn