01 A4 SS wont start

[qwicklt1ws6]

i dont have access to a tuning suite to disable vats, and only have one key, the connectors for the coils are hooked up

[qwicklt1ws6]

PCM, IGN fuses and relays are good i checked, and switched them out for new ones

[1BADAIR]

any codes?

[qwicklt1ws6]

it throws a coolant sensor code(broke it while doing headers). it ran while throwing the code

[98blackbeauty]

when did you do the headers and when did the car not starting problem happen?

[1BADAIR]

if the sensor is broke they normally read like -40 which will dump fuel and wash cylinders

[qwicklt1ws6]

the problem started when i got the headers done, initially the car was getting spark, but not getting any fuel, so i replaced the fuel pump/sending unit, it started right up after that, shut it off, and wouldnt fire. found the loose ground, hooked it up, now still not getting spark, i have an extra coolant sensor, i can hook it up, but dont think it has anything to do w the coils.

[1BADAIR]

where did you check for spark?
did you use the plugs that where in the car

[qwicklt1ws6]

they're new TR-55's, grounded to the header.

[98blackbeauty]

OK your all over the place, My suggestion, start over forget everything. 1. change the broken sensor. 2. determine if you have fuel. there is a schrader valve off fuel rail. Best is get a gauge and measure pressure should be 45-55 lbs. I put this as #2 because you changed pump, maybe it went bad!. 3. If you have fuel then start and check spark. pull a couple of plugs and check them. by now they could be flooded and if not gapped close or are old may be firing issue. I don't think its the plugs, but you need to eliminate them from being problem. 4. If no spark on any of the coil packs then you have a general problem. 5. get wiring diagram and check each step.

[qwicklt1ws6]

LS1 that was my old ws6 formy

[1BADAIR]

do you get a rpm sig from the crank sensor a a scan tool?
the crank sensor might be bad

[qwicklt1ws6]

that might be it, will try replacing it thursday. last time it ran without the ground on, i got the car to sputter a couple of times and had to give it gas to keep it going, then the check engine light flashed a few times and the motor shut off.

[sman]

Sounds like it could definitely be the crank sensor, thats what happened when my car would die. Loose the tack, light comes on, car dies.

[qwicklt1ws6]

replaced the crank sensor and the coolant sensor today, didnt fire