Join Date: Jul 2005
Location: Quebexico, Canada
Ferrari Life Posts: 1,990
Well, she is still running like a WWII tank when I start her from cold. So much so that she stalls 2-3 times in less than 2 minutes. She rev up to 1500 RPM then down to 500 RPM, up down, up down until after 3-4 minutes then falls to 1100 RPM and when warm flat a 1000.
So I decided to put my Eleanor fears aside and dive in.
MAF is a Bosch 0 280 212 018
I removed the plugs on the MAF sensors, then I took those 2 tiny flat head screws out that hold the MAF to the air box (I believe that flat head screw don’t belong on a car, they should have been Philips screws). Then I removed the clamp (again a stupid flat head screw on the clamp arghhh).
Once removed, I cleaned the inside of the MAF with cleaner then used compressed air to remove and dry the insides. I then took a multimeter to pin 1 and 6 and it should read 383 ohm’s. So 1-4 read 389 ohm’s and 5-8 read 391 ohm’s….too lean.
I removed the silicone around the top and removed the cap. I moved the S screw counter clockwise to reduce the resistance that richens the fuel. So I was at 389 and 391, too lean and probably why she was stalling when cold.
I then put the caps back on, silicone, reinstalled the MAF’s back in nice and tight. While I was there I checked the air filter and it looked pretty clean so I took the air hose to it and barely any dust came out.
The engine was hot (took her for a drive before) and got pissed because she stalls ONLY during the initial warm up. Even after a few hours she start fine, but start her up the next day when totally cold and she acts up.
So if this doesn’t fix it im thinking maybe a temperamental plug when cold. Absolutely no hesitation when warm and climbs the revs easily without issues.
I will do more testing with the MAF's if she is still acting up to find the right spot because I have an aftermarket exhaust and cats.
1990 348 TS (87284)
“I build cars for young men that only old men can afford” - Enzo Ferrari