distributor/cam pos. sens. question?
06-21-2008, 08:23 AM
#11
5th Gear Member
Join Date: Dec 2006
Location: louisiana
Posts: 2,763
RE: distributor/cam pos. sens. question?
ORIGINAL: alan94
i own a 94 gt, tuesday i ran my 2nd dyno with upsetting results hp down from 255 to 243, tq down from 285 to 263...WTF! the curves did look the same though.i even did a few minor modssince the first pull 2 yrs ago from now. i recently pulled my dizzy,before the 2nd pull,pulled wires off the cap, and was wondering if i may have put them back on wrong, one off or so. i did set timing back to 14* (plug pulled) i looked at the cam pos sens. and noticed one tong is narrower than the others, could this be my problem? the computer sensing the wrong readings due to the rotation of the wires being off one... oh and i really got showed up by a 2000ws6 they told me he ran 326 hp ... yea i dont believe it either, could the dyno just not beoff or what?
thanks
i own a 94 gt, tuesday i ran my 2nd dyno with upsetting results hp down from 255 to 243, tq down from 285 to 263...WTF! the curves did look the same though.i even did a few minor modssince the first pull 2 yrs ago from now. i recently pulled my dizzy,before the 2nd pull,pulled wires off the cap, and was wondering if i may have put them back on wrong, one off or so. i did set timing back to 14* (plug pulled) i looked at the cam pos sens. and noticed one tong is narrower than the others, could this be my problem? the computer sensing the wrong readings due to the rotation of the wires being off one... oh and i really got showed up by a 2000ws6 they told me he ran 326 hp ... yea i dont believe it either, could the dyno just not beoff or what?
thanks
06-22-2008, 05:02 AM
#12
5th Gear Member
Join Date: Jul 2003
Location: United States
Posts: 3,451
RE: distributor/cam pos. sens. question?
ORIGINAL: 94StinkinLincoln
cam position sensor, did anyone catch this?
cam position sensor, did anyone catch this?
I'd double check the timing with a light.
06-23-2008, 12:42 AM
#15
5th Gear Member
Join Date: Jul 2003
Location: United States
Posts: 3,451
RE: distributor/cam pos. sens. question?
ORIGINAL: alan94
i re-timed it @ 14* (plug pulled) it seems to run the same???
i re-timed it @ 14* (plug pulled) it seems to run the same???
ORIGINAL: AdderMk2
turn your timing down to 12°, and make sure your distributor is in correctly
turn your timing down to 12°, and make sure your distributor is in correctly
06-23-2008, 05:02 AM
#18
5th Gear Member
Join Date: Jan 2006
Location: Puerto Rico
Posts: 3,926
RE: distributor/cam pos. sens. question?
ORIGINAL: alan94
oh , and how can i check to make sure my distributor is in correctly? my chiltons is very vague.
oh , and how can i check to make sure my distributor is in correctly? my chiltons is very vague.
06-23-2008, 06:19 AM
#19
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Join Date: Jul 2003
Location: United States
Posts: 3,451
RE: distributor/cam pos. sens. question?
You can stab the disty in incorrectly, but you'll need to get it on time. I took mine out & restabbed it because I was running quite a bit of timing at one point & the water neck was limiting how much I could run, so I took it out, restabbed & retimed it so it was further over.
You could stab it in 180 off technically as long as you moved the case 180 degrees aswell so the pip signals are correct & it fires #1 while the pointer is near the #1 prong. The timing light is what's going to verify if you've got it right.
As far as 14 degrees, most stock 5.0's start to fall off after 13 degrees base timing. When I had my stock cam in, I lost power above 13, with the x303 cam in i've had it up quite a bit more & the power doesn't fall off. Some setups you gain, some you lose. From what i've seen most stock cam setups or similar grinds tend to fall off there. 12/13 is generally where they get the most power.
Not saying it's going to fix the problem, I'm just saying it's something to check. If that doesn't work we can move onto adjusting a couple other things, like checking some of your sensors. To narrow it down the sensors that it could be would be maf, map, ect, act, & tps as they're the only ones really doing anything at wot. But if the car is acting normal you can pretty well rule all of them out.
If timing isn't it, it'll more than likely be tuneup things... spark plugs gapped incorrectly, old wires, worn out cap/rotor, fuel filter, things like that...
Check timing first.
BTW, what "minor" mods did you do to the engine after the run 2 years ago?
You could stab it in 180 off technically as long as you moved the case 180 degrees aswell so the pip signals are correct & it fires #1 while the pointer is near the #1 prong. The timing light is what's going to verify if you've got it right.
As far as 14 degrees, most stock 5.0's start to fall off after 13 degrees base timing. When I had my stock cam in, I lost power above 13, with the x303 cam in i've had it up quite a bit more & the power doesn't fall off. Some setups you gain, some you lose. From what i've seen most stock cam setups or similar grinds tend to fall off there. 12/13 is generally where they get the most power.
Not saying it's going to fix the problem, I'm just saying it's something to check. If that doesn't work we can move onto adjusting a couple other things, like checking some of your sensors. To narrow it down the sensors that it could be would be maf, map, ect, act, & tps as they're the only ones really doing anything at wot. But if the car is acting normal you can pretty well rule all of them out.
If timing isn't it, it'll more than likely be tuneup things... spark plugs gapped incorrectly, old wires, worn out cap/rotor, fuel filter, things like that...
Check timing first.
BTW, what "minor" mods did you do to the engine after the run 2 years ago?
06-23-2008, 02:52 PM
#20
Thread Starter
Join Date: Jun 2008
Location: evansville, IN
Posts: 21
RE: distributor/cam pos. sens. question?
i guess i should have told you all the mods to my car in the beginning, sorry, here goes:FR Ecam, 1.7 rollers,cal. mass air/w 24 lb. inj., 70 mm tb, cobra upper,lower gasket matched to ported/ polished69, 351w heads,im pretty sure the bottom endhas a stock stroke,bbk shorties, off rd. h pipe, to flowmasters, msd blaster pack/ cap rotor, FR 9mm wires, griffin dual core alm rad. 160* thermostat, and it has a swanson chip plugged in the top of the eec box under the pass. kick panel
as far as those minor mods are concerned: underdrive pulleys, and i sanded out, not polished,the rough casting marks in the lower intake runners
ive owned the car three years it had 83k when i bought it, today it has 100k i dont really drive it much
as far as those minor mods are concerned: underdrive pulleys, and i sanded out, not polished,the rough casting marks in the lower intake runners
ive owned the car three years it had 83k when i bought it, today it has 100k i dont really drive it much