Hello Friends, Discussion please; My '85 Euro Testarossa has an idle instability problem. No amount of balancing airflow or fuel:air mixture adjustment has cured it. When set at a 1000rpm idle, the engine speed cycles up and down until finally dying. Tweaked up to 1500rpm, the idle is stable but the warmed up engine typically dies after a throttle blip. My friend Charles Perry also has an early Euro Testarossa with the SAME problem. With his car, all went well for a decade then the problem began, continuing to today. Your advice, ideas and discussion are appreciated. Rick Lindsay
1. Is your early Euro completely stock (K-Jet without Lambda) or has it been "modified" (to "quasi-Lambda") for US legality? 2. Are you saying that the regulated supply pressures, the cold control pressures, and the warm control pressures have all been verified as OK too?
you may use some carb cleaner or fuel in a spray bottle and check for wrong air first before you try more
Suggest start with the simple stuff....check all the hoses you can find for air leaks. If the KJet system is not airtight it will never work right. I had a similar problem on my 328...turned out the vacuum hose that goes from the plenum to the ignition box in the rear (triggers the ignition advance I think) had a hole worn in it out of sight behind the wheel arch.
I have the same issue with my TR only at idle for the first few minutes at idle. Once warm the idle is perfect.??? Anyone have any advice here? Sent from my iPhone using Tapatalk
Does the coolant temp guage start to jump around when the idle gets like this and then just before the engine dies?
