Testarossa - Ignition, Fuel Injection Problems - Sympathetic EFI Upgrade Pro

Did you ever dyno it?


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I think with out the bosch CFI the engine will have about 10 - 15% more power and also more torque, even more when right adjusted/mapped

 

Dyyyynnnnoooo results???


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Hi ,it seems I have an idling issue in my 1985 testarossa. I stumbled across this thread and think it may indeed help. It has been in and out of 2 shops for a year or so. After the car gets warm, the engine will idle at 2k RPM, and more recently it goes up to 3k RPM. After a blip or two it will decrease back down a little, but it seems to settle at 2k RPM. I can go up a hill in gear without any accelerator input. It can be scary to drive at times with this going on! Can someone put me in touch with sean and santino please, or give me a steer on how to proceed?
Thanks, regards,

 

you are a member here since more than 8 years and until not even filled out your profile or introduced yourself a little.

if you would do so I think you have better chance to get help

 

A high idling tr is not really that difficult to diagnose and fix. I just hope previous attempts didn't make it worse for the next guy who tries to fix it.

 

He could just be a fellow who looks at the sight as a resource.

 

Hi, I must admit that I do not log on that often unless I have a particular issues to address. Apologies if I've come across as anti-social which is unintentional!
I like cars generally and run 2 ferraris currently: a 550 wsr and an early '85 testarossa. I run a few other marques also in the stable but enjoy Ferrari most (when everything is working). I'll have a look at the profile function later.

It would be most helpful if Mr Bakowsky or someone could advise me on how to direct the mechanic to address this high idling (when hot) issue . It's been in and out of 2x ferrari specialist shops here and the issue still exists! (Let me know if I should start another thread)

The car is a UK RHD spec.

 

Much to difficult to figure this out over the internet. I would love to help, but unfoetunatly without the car in front of me, or a chain of events..we will be basicly pissing up a rope.

Im quite sure there are a few good shops around you who could figure this out. Look for places that service old benz, or porsche..even volkswagon cars. Ill bet they could fix it no problem. Ferrari used so many components from these cars and the basic operating principle is the same. Dont spend crazy money when ypu dont need to.

 

thank you for filling out your profle and also introduce yourself a little

when you have been already in 2 F garages and they not found the mistake then I think it is a major problem, if they checked right?
as tbakosky has written, go to a mercedes, porsche or VW garage who repairs older cars.

I would start with the following:
trottle plates completly closed
auxiliary air valves open when cold and closed when warm
trottle cable moving easy
engine getting wrong air

what rpm does the engine has when cold in idle?
when you drive a while ( minimum 20 km ) is it still the same with the high idle between 2000 and 3000?

is the car in hongkong or in GB?

 

Look to see if the rubber boots between the intake manifold and injection are cracked?

 

I would simply smoke test both banks one at a time. Any vacuum leak will be very apparent..if none found..I would then check the idle valves for proper function. Take them off and throw them in the freezer, if both close, and then open up as they get warmer.

 

idle valves? what are those?
the auxiliary air valve or the bypass vacuum valve?
it is a 85 car with CIS, not with electronic injection.
the auxiliary air valve is open when cold ( the engine needs additional air and fuel ) and get closed when warm

 

The car is in HK . Lack of good old school mechanics here, and I have already gone to the two specialist houses here over the last few years. Thank you Mr Bakowsky (pissing up a rope ahahahah) and ago car nut and turbo joe for your input .

All good ideas gents.
I will try my trusty old school porsche guy who does many cars in HK . I will tell him all of the above.

It starts at normal RPM around 1k ballpark.
When it gets hot (say around 20 km post start) , it then will idle around 2k rpm, and on acceleration even go up to beyond 3k rpm lately.

 

those symptoms shows of getting to much air when the cold idle is ok.
so let check first the auxiliary air valves ( 125880 ), they are from bosch

 

Some more light reading for you

https://www.ferrarichat.com/forum/threads/idle-rises-after-warm-up.324006/

 

Sorry Joe. .you are right. I got angry at my auto correct and just wrote idle..however I'm quite sure you understand what I was getting at.

 

I think I know what you mean
but I was and still be confused what you have written:
Take them off and throw them in the freezer, if both close, and then open up as they get warmer.
it is exactly otherwise, so the colder the more open

 

D'oh!! Boy oh boy..did I screw that one up..sorry..my bad..yes they will CLOSE!! Lol

 

so what had you drunken? or smoked?
must be good stuff

 

Oh buddy...lol..I should not have been posting last night..I'm still trying to recover.

 

Hi Sean,
Please check your PM . Very interested in the EFI KIT but dont know how and where to contact you