juiSSed1172

i just finished a cam & lifter swap that took way too long (car hasn't been started in like 4 months)


I cranked it with the coil packs disconnected to prime the oil pump.

I connected them, cranked it again and it back fired once.



Now it will crank and do nothing.


Security light is not on. I have fuel pressure at rail. Help.

SLP4CamaroSS

iTrader: (16)

double check all the connections then check it again you might of missed somethign

juiSSed1172

ive been checkined and checking... where is the cam sensor connection? I heard that one is easy to miss.


also, what grounds on the back of the pass head?

SLP4CamaroSS

iTrader: (16)

mine where on the driver side the grounds

juiSSed1172

i have the grounds on the drivers side all hooked up, but there is a bolt on the pass side as well for grounds.. it's in, but no ground wires on it.

05 GSXR 1XXX

iTrader: (16)

that backfire was the rings twisting and lodgin the pistons to the walls... j/k

doesnt sound like you missed anything. if the car starts it will start again unless somthing was unplugd.

im sure someone will chime in with the solution! good luck!

cals400ex

iTrader: (27)

there are 3 grounds on the back of the drivers head. 2 of them go to the same bolt. there are no grounds on the back of the passenger head. one of the bolts has a wire holder on it, just to hold some wires. the other one holds the tranny dipstick in place.

98Camarod

iTrader: (43)

Ignition relay? Switch your fan 2 relay for the ignition relay and see if you get anything out of that.

thosewhohatedmecreat

i did some work on my engine and hooked the coils back up backwards, make sure the wires are right side up lol.... same with the fuel injectors..

juiSSed1172

I didnt remove the coils from the valve covers, no way to switch them...

2000TurboVert

iTrader: (17)

Have you checked all your fuses?

2000TurboVert

iTrader: (17)

If you didnt, get a voltage meter and see if your getting power to the ignition relays and fuses.....

eallanboggs

iTrader: (1)

Back to basics. Fuel, spark, compression. Fuel pressure at fuel rails says fuel pump is OK, but what about the injectors? Are they being pulsed? Coil packs weren't removed from the rocker covers, but are the individual coils receiving the primary signal at the correct time to give you spark on the compression stroke? Separate this into either a fuel or spark problem then work backwards to the solution. How many ground does one engine need. Apparently some engines can never get enough ground. If you changed the lifters the heads and intake came off so the number of things you could have done to cause this problem are too numerous to list. Were you careful in handling the intake? You could have damaged a sensor. Do you have spark? Are the injector firing? Narrow it down and work backwards.

Psychopjv

iTrader: (16)

backfiring is what it likes to do when the cam sensor isn't plugged in/or broken. motor spins over freely though? positive timing marks were aligned? crank sensor in? no massive vac leaks? as stated we could go on for days.

juiSSed1172

I'm going to try another cam sensor today and i'll let you guys know the results.

Thanks for all the help.

LS1powerhouse02

iTrader: (9)

make 100% sure you lined the dots up!!! if not you may not want it to start!

Brent

juiSSed1172

The dots were lined up, and i also spun it over by hand with the plugs out to check it. I have a pretty giant cam in there (ms4), so if there was a PTVC issue from misaligned dots, I would have known

juiSSed1172

Swapped out Cam sensor, and I saw a broken head ground.. Ran an extension to the pass head for it...

Started up first try. It idled GREAT @ 1100.. then it got hot and just shut off, lol. Now it doesn't idle for ****. I guess I was a little too excited when an untuned ms4 idled well. LOL.

98Camarod

iTrader: (43)

glad to hear you got it started