98LS1RPM6SPD

I shifted from 2nd to 3rd missed made a noise then after a couple seconds service engine soon light flashes only in 3rd. No lights at idle,1st,or 2nd just 3rd. Drove to autzone their scanner couldn't read it.

1999ls1sscamaro

What state are you're from? I can look at it if your from CT. I run HP tuners and Palmer Performance software on my Camaro's.

brandon6.0

iTrader: (32)

is it 6 speed? if so u could have mechanicaly overreved which could have bent the pushrods.

A flashing service engine soon light usually means random misfire of some sort.

98LS1RPM6SPD

It is a 6 speed and I live in south Mississippi. The light only flashes in 3rd. I can rev it at idle no light only when I get to 3rd.

vettenuts

iTrader: (4)

Over revs typically end up with bent pushrods in a stock motor. Probably need to pull the valve covers and do some investigating. Blinking engine light is a random misfire, however if you read the codes you may have others stored as well.

Old Geezer

iTrader: (3)

ONLY in 3rd......

Darth_V8r

iTrader: (4)

I was thinking this myself. Although, just recently I couldn't rev past 5k in second after missing a shift, and of all the weird things it was the P/N rev limiter kicking in. But I had no flashing SES.

If it were my engine, I'd check compression all eight cylinders

00pooterSS

iTrader: (40)

A flashing light is a misfire. It can be any one cylinder misfire or random. It flashes with a misfire and no other codes because misfires can cause damage.

Any way, if it's "only in 3rd" and not in 1st or 2nd, I bet money it does it in 4th 5th and 6th too.

I see this a lot at the shop, when ignition components start wearing/breaking down the misfire shows more and more as engine load increases, particularly at lower RPM. You generally don't spend any time at low RPM in 1st or 2nd.

However, it's counter intuitive to think it's ignition after an over rev instead of mechanical. But weird **** happens.

I'd pop the plugs out, inspect them, and do a compression check and see what you find there.

Put new plugs in since you will have them out if you don't find anything and see how it acts. New NGK copper plugs are only about $2 each so it's a cheap thing to try if you don't find an obvious problem, and you'll already be there.