86 Testarossa KE Jetronic problem

I have an 86 US TR that I think has a problem with the KE Jetronic. I have removed the air filter and the flex elbows. When the car is running and I push in the right side control vane it affects the motor as it should. If I push in the left control vane nothing happens, the motor is not affected at all. If I go to the shop manual where it tells how to adjust these vanes it states: motor off, push it down an it should come back up slowly and bounce once at the end of its travel. The right side (pass) does just that. The left side has no resistance at all an snaps back up with no bounce. Since the left side is not running right if at all I wonder if there is something broken or disconnected in the linkage inside the housing.

I have checked the fuel pump pressure after the filter and it is strong. The car has new fuel filters. If someone has a link to a manual with a blow up of the components please post it. I have had a problem with this car for a year but I have been working out of town and I am just getting to work on it again. The car has no power and the left side is not getting fuel. Any suggestions? (please Ferrari owners only)

 

Thanks guys, I looked at it today and hot wired the pump, I do not have a pressure tester, while it was running I cracked the cold start fitting slightly and I was greeted by a spray mist of gas under a a lot of pressure. Is there a place where I could hook up a tester if I buy one? The ones I looked at had a fitting to hook on the fuel rail of a current system, no where near any fitting I see on the TR.

 

so the fitting on the gauge would have to have to look like the fuel line? A loop for the longer bolt to pass through?

 

I checked the pressure at the cold start fitting (fuel distributor)and it was 78 PSI with that fuel pump hot wired. At least I know it is not the fuel pump. Now I am going to pull the air cleaner and check to see if the air flow sensor has "no" resistance with the fuel pump running as it did before with it off. I keep thinking something is unhooked or broken inside the unit.

 

Thanks for your reply, I will give that a try and let you know.

 

Just hot wired the fuel pump on the 7-12 problem side and the first thing I noticed was the air metering plate had resistance and made a moaning sound when I pressed on it. I started the car with that fuel pump still running and it snarled and ran way better. I let it warm up good and the hot wire fell out of the fusebox and it quit. I then did what you said at the cold start fitting and bled off the pressure. Both sides seemed to be exactly the same with the pressure releived. I was tempted to spray some Gumout in the air metering plates but didn't yet. It did backfire a little on the 7-12 side when I reved it up. Also with the fuel pump running it did not stall when I let off the gas as before. I am going out to switch relays and see if the is any differnce.

 

Steve M. and TurboJoe and Carguy,

Went to plug in the relay and it blew a fuse, bought new fuel pump relays installed them and it ran great. Drove it and its fixed, just flys. Steve, the test where I release the pressure at the cold start valve and compared the movement got it through my head that they move the same with the pressure at 0.

Thanks again!