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iTrader: (5)

So... stock coils. Using a haltech e6x.

Cars been running fine besides the tune.

Recently it's been flooding.

I check spark on both coils.

Trailing coil is firing half the fires per leading coil fires.

I'm stumped.

Checked my b/y wires in and they are good. Coil is bolted in and has a solid ground.

FührerTüner

iTrader: (5)

Bump

jjwalker

Leading coil does wasted spark, so the leading coil fires 6 times per revolution of the engine. The trailing coils fire 3 times per revolution. Are you just checking one trailing coil or both?

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iTrader: (5)

I checked both. For every 2 sparks on leading coil, the trailing coil sparks once.

Edit: that is on one spark wire on trailing coil

gxl90rx7

iTrader: (1)

that is normal. does it only flood when you try to start? cold starts or hot starts or both? was it tuned in a different season? priming map probably is not tuned for colder temps

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iTrader: (5)

Floods when I try to start. I has gotten a bit colder lately but Here's the thing.

I started it Saturday morning, drove it on to a trailer so I could get my exhaust done. I show up to the place and it doesn't wanna start.

Haven't got it to start since. I have wet trailing plugs and dry leading

gxl90rx7

iTrader: (1)

check the coolant temp, air temp, and map sensors in the haltech software, make sure they read normal and are not unplugged. what does the priming map look like (post screenshot). if it is severly flooded, usually a push start will clear it out and will start normally after that. make sure its warmed up before you cut it off

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iTrader: (5)

Compression, fuel, and spark Were all just checked by me. All good.

Here's a funny thing I noticed on my fuel map.





This is with the car off.

Shouldnt the green arrow be somewhere near atmospheric pressure?

Also I think the purple lines are when the second stage kicks in, am I correct?

gxl90rx7

iTrader: (1)

yes that looks wrong, so it looks like a bad map sensor. with the key on, engine not started, the pointer should be on the zero mark

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iTrader: (5)

Yeah I agree.

I did some searching and found a lot of mixed answers.

It seems most people are getting Stoich a/f confused with atmospheric pressure, thinking it is 14.7.

0 makes sense to me.

Anyone have any experience using the 40 dollar gm 3bar from Amazon?

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iTrader: (5)

So I was doing some searching.

Atmospheric pressure at sea level is 14.7psi or about 101 kPa.

I'm at about 38 feet above sealevel so shouldnt my map sensor read near 100 kpa with the car off?

gxl90rx7

iTrader: (1)

the zero mark on your map is technically 101kp absolute, but it will be 0 at sea level. gm 3bar sensor will work fine, but may need retune or a rescale if you are currently using internal sensor.. I believe the external gm map sensors are relative to atmospheric pressure, meaning they will read the same at any elevation. the e6x built-in map sensor is absolute, because it was meant to be used as barometric sensor (measures atmospheric pressure), and will change relative to elevation

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iTrader: (5)

Thx for the info. I am running gm 3 bar. Guess it's time to replace it. They want 110 bucks at oreilly. I think I'll shop around

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iTrader: (5)

So I bought a map sensor on Amazon.

It was reading right but car still wouldn't start and was flooding and fouling the trailing plugs.

I bought some msd wires and some hks plugs and it fired right up.

The fouled plugs were only 2 months old but the wires were ****.

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iTrader: (5)

This comment is intended for people with a similar problem.

Just wanted to add to this. I had this problem again, with the car not starting.

Swapped plugs for brand new ones. Fired right up.

I think it's burning through plugs because of my timing being way, way off.