ls2corvair

i have a mid engine corvair with 06 gto ls2 4l60e transmission to corvette c5 diff. engine shows 0 spark advance with scanner. even driving 0 spark. any ideas?

i r teh noobz

iTrader: (4)

Not sure about the LS, but I had a Subaru do that a few months ago. Ended up being a cracked knock sensor.

TPS and MAP should determine load. Are they reading right?

ls2corvair

i did not check them this time, they were fine before. i just got my ecu back today, i had it redone , thought that would fix timing issue but it did not . i`ll check tps and map readings in the morning. i really dont know what else will cause this issue.

Old Geezer

iTrader: (3)

Maybe try the diagnostic/tune forum????

the_merv

iTrader: (88)

Any codes? Has the PCM been tuned?

ls2corvair

pcm has been tuned, but no codes. changed crank sensor today , but no change. had already changed cam sensor.

the_merv

iTrader: (88)

Who tuned it and what did they set the timing table to?

99MUSTANG5.3L

Did you double check your grounds? Mine did this and turned out that the coil ground was diconnected.

ls2corvair

i` ve checked all my wiring and grounds, i forgot to mention that will on live data on scanner, the crank and cam rpms at idle are abouy 150 to 200 rpms differance. when i rev to around 1700 they are within 50 rpms of each other. i thought they should be 2 to 1 at all rpms

ls2corvair

it was tuned by reutable tuner, i had another guy look at it and he reflahed the ecu and no change, sent it off again, and still no change

ls2corvair

i meat to type reputable

ls2corvair

cant type tonight sorry for the bad spelling

the_merv

iTrader: (88)

No codes for any of them sensors?

ls2corvair

no, no codes

the_merv

iTrader: (88)

Try changing the Cam Sensor

ls2corvair

already changed cam sensor

the_merv

iTrader: (88)

Hmmm..that's wierd..

ls2corvair

can someone scan their ls2 and check on live data and tell me what their crank and cam rpms are at idle and at 1500

S10xGN

iTrader: (11)

Have you checked the pins in the connector shell to make sure they're seated correctly?

i r teh noobz

iTrader: (4)

Cam RPM should be 1/2 crank RPM.

Does your scanner show calculated load?