Car won't start...HELP please!
We tried loading a tune on it from a car w/ a very similar setup. Only difference was a vic jr intake/accufab throttle body....I have a ported fast/NW 90mm....No luck on that attempt either.
Both times it ran for about 5 to 10 sec. Then it shut off (on its own) and never fired up again...It honestly doesn't even really sound like it is trying to hit, just cranking.
I have an electric fuel pressure gauge and a manual fuel pressure gauge right off the rail, both read 58-60 psi..... I am located in Springfield, MO. Tried putting and ecu out of another car in and replaced the crank sensor. Still no luck. At this point I am thinking it may be a faulty camshaft.....
That's a big cam for a stock cube motor and most certainly will require a retune. Anyway, you may have fouled the plugs from the constant cranking. I would replace them to make sure. Make sure you actually tune for your specific car instead of throwing in a canned tune and have a scan tool ready to log data.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
Gotta be along the lines of a Cam sensor then.. It sounds like it's running off the fuel in the lines and something is not priming the system or something is shutting the pump off.. Did you plug the MAF in in the back of the intake?? The ECM must be loosing a crank signal somewhere.
Or else excessive valve train noise could be pulling timing, but that wouldn't cause a no start. It's not the rockers, and it's not the darn valve timing..
sometimes the BS answers on here leave me scratching my head.. There is no 'learn' cycle for these, it's almost instantaneous. OBD I had learning cycles.. But my H/C w/ no tune sometimes takes 30 seconds to get the idle back.
Or else excessive valve train noise could be pulling timing, but that wouldn't cause a no start. It's not the rockers, and it's not the darn valve timing..
sometimes the BS answers on here leave me scratching my head.. There is no 'learn' cycle for these, it's almost instantaneous. OBD I had learning cycles.. But my H/C w/ no tune sometimes takes 30 seconds to get the idle back. Last edited by bayer-z28; Sep 7, 2008 at 10:33 PM.
Yes, the MAP is secured in the back of the intake. The fuel pump holds a constant pressure at the rails as I have an electronic FP gauge in the car. I will replace the cam position sensor and give that a shot. Also, the plugs are brand new, but I may go ahead and replace them again just to elimate the possibility.... I agree w/ you, this whole situation has me "scratching my head." I have never had this much grief w/ a LS1 cam swap.....
On a side note, this cam was run for 500 miles or so in another 347 car and it ran fine w/ no issues. That is also the car that I pulled the ecu from to try in my car. For whatever reason, it is trying to be difficult in my car....