Just a note: on the early cars, the idle control valve is replaced with a thing called the "auxiliary air valve" which is just a simple valve that closes via a bimetallic strip that heats up. It's in the same position as the later ICV, under the intake manifold. The early cars also have whats called an "electric air valve" which is the thing you mentioned that sits behind the airbox, and it opens/closes depending on if the AC compressor clutch is engaged, to make sure the engine doesn't bog down when the AC is on. Great video overall!
Haha… this video was nearly made for me 😭 Thank you!! Fiorentino is in the shop (loud rattle from something) so hopefully she’ll be all fixed soon! They’ll fix the coolant temp sensor too, pretty sure that’s the issue on mine, causing it to run too lean when cold starting because the car thinks it’s up to temp.
Thanks Chris! Unfortunately I won’t be there this weekend (the car is a long way away from being concours ready truth be told she had a hard summer lol) However, I will be up at 4till4 and then to Porsches and pancakes in Scottsdale on the second!
Ok brother, finally got my 951 fixed after $1,000 clams later..ouchhh..and it seems to be doing fine. The mechanic said a wire was shorting out on the alt. case..so nen wire cost me a year of cheeseburgers..grr. I might hang on to it.🤠👍
@@az_84_944Nah I wouldn’t sweat that. Not necessary at all. If you run BPRES6 ngks and put premium in your idles will be happier. It’s been a while since I’ve lived with an early car, but if your car is with you while you’re at school up north and your getting those really cold morning temps then your idle sounds right to me again like only 100-150rpm lower than what I’d consider “normal.” Regular idle should be 850+\- 50rpm Could literally be that your DME and all the electronic components in it are just super old and not as efficient and that does over time make a difference in the cars performance.
What’s your cold idle? I’d lean towards either a vacuum leak somewhere or that coolant temp sensor. Otherwise you might want to double check your idle is set correctly on the TB. Also might be worth making sure your throttle cable isn’t getting snagged or caught on something just in case.
I had a problem with my 86 NA, 900rpm cold then 1800/2000rpm at high temperature, the idle speed regulator/actuator was a weird brand.. Changed by a Bosch brand idle speed valve box second hand and no more problem today. The discount brand version should be of very poor quality or assembled upside down at the factory.. Check if your idle speed is correctly adjusted, air screw unscrewed by 1/2 turn or so it seems to me by shunting the connection to terminals B and C, check your vacuum lines and if no air intake by spraying brake cleaner here and there ;)
Just a note: on the early cars, the idle control valve is replaced with a thing called the "auxiliary air valve" which is just a simple valve that closes via a bimetallic strip that heats up. It's in the same position as the later ICV, under the intake manifold. The early cars also have whats called an "electric air valve" which is the thing you mentioned that sits behind the airbox, and it opens/closes depending on if the AC compressor clutch is engaged, to make sure the engine doesn't bog down when the AC is on. Great video overall!
@@czhu1729 Thank you for this!!
Haha… this video was nearly made for me 😭 Thank you!! Fiorentino is in the shop (loud rattle from something) so hopefully she’ll be all fixed soon! They’ll fix the coolant temp sensor too, pretty sure that’s the issue on mine, causing it to run too lean when cold starting because the car thinks it’s up to temp.
@@ireiaand hopefully that’s all it is! Keep me posted once you know!
Nice work.
Are you going to Flight Concours on Saturday?
Thanks Chris! Unfortunately I won’t be there this weekend (the car is a long way away from being concours ready truth be told she had a hard summer lol)
However, I will be up at 4till4 and then to Porsches and pancakes in Scottsdale on the second!
Ok brother, finally got my 951 fixed after $1,000 clams later..ouchhh..and it seems to be doing fine. The mechanic said a wire was shorting out on the alt. case..so nen wire cost me a year of cheeseburgers..grr. I might hang on to it.🤠👍
@@Workerbee-zy5nx glad it’s sorted!
@@TakeFlightGarage You bet bro. Air conditioning is next, and some miner PDR..👍🤠
Is it normal for my 84 944 to idle at 700 when cold and 1000 when it warms up? You'd think it'd idle higher when cold.
@@az_84_944 for your earlier car that’s normal ish. Maybe a tad low
Remember the early cars don’t have that more modern fuel map where they run super rich for a second until they warm up
@@TakeFlightGaragewould i be able to add an auxiliary air valve?
I have the same behavior on my '83; it has a 800 rpm cold idle and warms up to 950~1000 ish
@@az_84_944Nah I wouldn’t sweat that. Not necessary at all. If you run BPRES6 ngks and put premium in your idles will be happier. It’s been a while since I’ve lived with an early car, but if your car is with you while you’re at school up north and your getting those really cold morning temps then your idle sounds right to me again like only 100-150rpm lower than what I’d consider “normal.”
Regular idle should be 850+\- 50rpm
Could literally be that your DME and all the electronic components in it are just super old and not as efficient and that does over time make a difference in the cars performance.
On my 86 turbo I'm having and issue with the idle increasing to about 2k rpm when coolant is up to temp. Trying to figure out what is causing it.
What’s your cold idle?
I’d lean towards either a vacuum leak somewhere or that coolant temp sensor. Otherwise you might want to double check your idle is set correctly on the TB.
Also might be worth making sure your throttle cable isn’t getting snagged or caught on something just in case.
I had a problem with my 86 NA, 900rpm cold then 1800/2000rpm at high temperature, the idle speed regulator/actuator was a weird brand.. Changed by a Bosch brand idle speed valve box second hand and no more problem today.
The discount brand version should be of very poor quality or assembled upside down at the factory..
Check if your idle speed is correctly adjusted, air screw unscrewed by 1/2 turn or so it seems to me by shunting the connection to terminals B and C, check your vacuum lines and if no air intake by spraying brake cleaner here and there ;)