chuys98ls1

iTrader: (2)

the car will crank but it will not start what should i look for i got fuel i got pressure i got power what sensors should i check i read something about the crank sensor if its bad the car will not start any info will help thanks

psiconversion

iTrader: (5)

Did you have the VATs turned off in the PCM? What kind of harness are you using?

chuys98ls1

iTrader: (2)

i got the stock tune i just check if i had power and ground on the coil harness and i do and my harness was done by speartech and i just also change the crankshaft sensor and same thing it does not wanna start

Old Geezer

iTrader: (3)

Maybe, no inj pulse????? Check inj pulsing w/ a noid lite.
Maybe, no fire at the plugs?? Just because you have power at the coils, does not mean the plugs are firing...Check the plugs w/ a timing lite..

rotor vs. piston

iTrader: (3)

Also grounds... double check all of your grounds.

Lil'John

Does this mean no tune work at all on the PCM?

If you have not sent the PCM to anyone, your issue is VATS(vehicle anti-theft system) You MUST tune it out OR try to integrate all the factory stuff.

psiconversion

iTrader: (5)

Per my previous post. VATs is going to cause this problem.

chuys98ls1

iTrader: (2)

today i just might check for inj pulse i have have to go buy the noid lite or rent one out of autozone

chuys98ls1

iTrader: (2)

the only grounds that i know that are in the harness are the ones that are located in the driver head which are to 15m bolts right


well the harness was done by speartech they are really good at lt1 to ls1 swap harness i was told and i search that everything work perfectly but if i have to get tune then i will but how much will this cost me cus i;m over the budget already

LS1MCSS

iTrader: (18)

VATS won't keep it from starting. It will just make it die 3 seconds after starting. What kind of car is the engine in? Make sure you have power to the pcm when cranking the engine and make sure you have a good ground to the back of the head.

chuys98ls1

iTrader: (2)

i check the grounds and they are good now the engine when in to a 93 trans am it come from a 2000 camaro and like i said the harness was done a speartech a sponser here which they do this kind of swap and harness and they never had problems which i search for nearly a year on people that got there harness rework by speartech i'm about to give up and send it to the shop and see if they can find the problem

gofastwclass

iTrader: (2)

Are you getting 12 volts to the harness? Remember your keyed power should NOT be the power for the distributor you took out. If it is an aftermarket (speartech, etc.) harness - do you have good fuses in the fuse holder?

Someone mentioned grounds... you need a ground from the engine to the harness, from the engine to the battery AND from the engine to the body / frame.

Do you have 58 - 60 PSI of fuel at the rail? Does the fuel pump come on?

I know this sounds obvious but sometimes it's the obvious that gets us frustrated.

chuys98ls1

iTrader: (2)

i check all fuses and they are all good , now the grounds the engine to the harness they are good and from the engine to the battery its good but from the engine to the frame i dont know because i dirent see any ground wire for engine to frame

psiconversion

iTrader: (5)

As LS1MCSS said above, make sure the 'switched' power wires have power in CRANK as well as the KEY ON position. I have seen where people hook them to an accessory port on their vehicle fuse box and when the key is in CRANK there is no power at these wires.

fmowry

iTrader: (14)

I had this problem with my LS6 Miata swap. Good call on that.

Frank

cutlass_455

iTrader: (2)

Try a small blast of starter fluid (ether) in the intake and hit the key, if it fires you know you got spark and you got a fuel problem. My conversion I had plugged fuel injectors...I swapped them out with some others I had around and it fired right up.

39fordcorvette

all 8 of them. cost me 200.00 from the injector connection

cutlass_455

iTrader: (2)

I thought about soaking my bad ones in seafoam, but I had the spares right there (and they were 5 years newer with less miles on them), so I gave them a try and worked right off the hop.

chuys98ls1

iTrader: (2)

where can i find this wires at i dont cus i diren't do the harness i send them to get it done

i try that already and nothing i got fuel pressure i just change the fuel pump cus it was bad now i check and i dont have spark at all what can it be?i also cahnge the crank sensor already and nothing

cutlass_455

iTrader: (2)

Make sure you got the cam sensor plugged in properly, its at the back on top, just behind the intake. The sensor could be bad. Do you have gauges hooked up, or HP Tuners to see what the sensors picking up?? Can you see RPM while rolling?? Like those other guys were saying, make sure that the coils are gettin power during CRANK and RUN.

John at Speartech does a great job, he did mine as well as many other members here. Make sure you follow the instructions that came with your harness. He sends nice instructions that you have to read very carefully, if you miss a step you will end up in a pickle. If yours is like mine, you probly have a small fuse block added to your harness by John, one of those was for ignition wasnt it, that should be hot in CRANK and RUN.

Do you smell fuel in the exhaust??

Also consider adding that ground from engine to frame, its not hard to do, and its good insurance.