hey guys,
so ive been having a real bad time with timing my new 351W in my 1990 bronco. originally i did not have a timing light so i timed by vacuum. i read that between 18-22 in. Hg was a standard reading. i originally had 15 and very little power output. so i tuned by vacuum and was able to get it up to around 20.5 in. then i hit it with a timing light when i got home (was working on it while at college) and was way far off from 10 degrees BTDC, i dont even think i was on the scale, but was still BTDC.
then just recently I timed using this method:
http://www.fullsizebronco.com/forum/showthread.php?t=168214
which i thought would fix all my problems. i did everything he said, with the exception of using a timing light. i once again used my vacuum guage, hooked up to my MAP port on the manifold tree. I was able to get the same, if not a little higher than before. this is all at idle mind you. now the car runs very poor. when i get her up to highway speeds, and let off the gas it sounds like there is rubbing, and if i hit the brakes she she shakes a little and it just doesnt sound good. now i would think it was the brakes but i just redid them and had been driving it for 2 weeks prior to trying this. so i do not believe it is them since this started happening once i retimed. when i hit it with the timing light, im yet again wayy off the scale of BTDC. i'm so confused and cant figure this out.
another problem is after ive had her running and i put it in reverse, she stalls out. that i have no clue what the problem is. and my oil pressure is at like, 100 on the guage I installed. when i first dropped the engine in about 6 months ago, it started at about 50-60, and now has slowly been building.
any ideas? id really appreciate some help with this stuff guys. thanks!
so ive been having a real bad time with timing my new 351W in my 1990 bronco. originally i did not have a timing light so i timed by vacuum. i read that between 18-22 in. Hg was a standard reading. i originally had 15 and very little power output. so i tuned by vacuum and was able to get it up to around 20.5 in. then i hit it with a timing light when i got home (was working on it while at college) and was way far off from 10 degrees BTDC, i dont even think i was on the scale, but was still BTDC.
then just recently I timed using this method:
http://www.fullsizebronco.com/forum/showthread.php?t=168214
which i thought would fix all my problems. i did everything he said, with the exception of using a timing light. i once again used my vacuum guage, hooked up to my MAP port on the manifold tree. I was able to get the same, if not a little higher than before. this is all at idle mind you. now the car runs very poor. when i get her up to highway speeds, and let off the gas it sounds like there is rubbing, and if i hit the brakes she she shakes a little and it just doesnt sound good. now i would think it was the brakes but i just redid them and had been driving it for 2 weeks prior to trying this. so i do not believe it is them since this started happening once i retimed. when i hit it with the timing light, im yet again wayy off the scale of BTDC. i'm so confused and cant figure this out.
another problem is after ive had her running and i put it in reverse, she stalls out. that i have no clue what the problem is. and my oil pressure is at like, 100 on the guage I installed. when i first dropped the engine in about 6 months ago, it started at about 50-60, and now has slowly been building.
any ideas? id really appreciate some help with this stuff guys. thanks!