Hi,
I'm having some trouble with my 1986 5.0 with a mass air conversion. There is no timing advance during reving up.
After the mass air conversion (not inmediately thereafter) a problem accured, power went down and the tailpipe became black, there were stubles, mostly around 1800 rpm.
I checked the obvious, vacuum leaks, IAC, tps etc. Nothing found.
Then one day the show went over and I was stranded after 5 minutes driving. After some cooling down it started again. I blamed the TFI.
I also checked for codes, it came up with a 34 and a 18.
Before installation of the TFI I checked the timing: 12 degrees but no advance at all!
After installation it started up but stil a bit rough. I checked the timing, it was still at 12 degrees but no advance. mmmmm
I checked the spout, seems to be good, 8 volts with engine running (measured at the EEC and at the spout, then with engine of at the TFI connector. No problem found. (with engine of the voltage dropped in time from 8 volts to less than 2).
No I'm confused. What more can I check? Can the EEC be bad?
Can the hall pickup be defictive?
How do I measure PIP.
How does the timing advance work (which signal triggers what)?
Thank,
Adam
(a 5.0 lover from the Netherlands)
data: 5.0 with a A9P (during conversion all soldered), T5, MSD blaster 3, full stainless exhaust, flowmasters, no converters, 70 mm throttle body and EGR spacer, 76 mm air meter (C&L) for 19 lbs (yellow/gold tube), C&L airpipe etc.
I'm having some trouble with my 1986 5.0 with a mass air conversion. There is no timing advance during reving up.
After the mass air conversion (not inmediately thereafter) a problem accured, power went down and the tailpipe became black, there were stubles, mostly around 1800 rpm.
I checked the obvious, vacuum leaks, IAC, tps etc. Nothing found.
Then one day the show went over and I was stranded after 5 minutes driving. After some cooling down it started again. I blamed the TFI.
I also checked for codes, it came up with a 34 and a 18.
Before installation of the TFI I checked the timing: 12 degrees but no advance at all!
After installation it started up but stil a bit rough. I checked the timing, it was still at 12 degrees but no advance. mmmmm
I checked the spout, seems to be good, 8 volts with engine running (measured at the EEC and at the spout, then with engine of at the TFI connector. No problem found. (with engine of the voltage dropped in time from 8 volts to less than 2).
No I'm confused. What more can I check? Can the EEC be bad?
Can the hall pickup be defictive?
How do I measure PIP.
How does the timing advance work (which signal triggers what)?
Thank,
Adam
(a 5.0 lover from the Netherlands)
data: 5.0 with a A9P (during conversion all soldered), T5, MSD blaster 3, full stainless exhaust, flowmasters, no converters, 70 mm throttle body and EGR spacer, 76 mm air meter (C&L) for 19 lbs (yellow/gold tube), C&L airpipe etc.