LS1 misfire

Reply Subscribe

Thread Tools

Search this Thread

Aug 14, 2023 | 06:00 PM

1972LS1Camaro

Thread Starter

Teching In

Joined: Aug 2012

Posts: 12

Likes: 1

From: Cleveland, Ohio

LS1 misfire

Hi guys, so I have a 2002 LS1 transplanted into my 72 Camaro and it’s been running like a champ for 7 years. Last summer we had a lot going on and did not drive the car much at all.

in the fall I was driving the car to where I store it and it was running terrible, horrible miss to the point it would hardly run.

so this spring I got it out and pulled the map sensor to find some moisture on it, I replaced the sensor and it runs better but still has a pretty bad miss in the low end.

it was originally throwing a map code but is no longer showing any codes. If I run it at wot it will miss till it hits about 1800 rpm’s , then it cleans up and runs fine.

I pulled the plugs for inspection, they look a little fouled but no smoking gun here..

has anyone dealt with a similar issue?

any help would be appreciated!!!

tia,
Scott

Last edited by 1972LS1Camaro; Aug 14, 2023 at 06:02 PM. Reason: Added information

Aug 14, 2023 | 06:08 PM

wannafbody

TECH Senior Member

iTrader: (3)

Joined: Apr 2006

Posts: 5,604

Likes: 1,149

From: Pittsburgh

Maybe some moisture in the fuel? Try running some Berrymans through the tank and see if it maybe cleans the injectors.

Aug 16, 2023 | 03:09 PM

LilJayV10

TECH Senior Member

iTrader: (39)

Joined: Apr 2007

Posts: 9,711

Likes: 999

From: Evansville,IN

What cylinders are misfiring?

You might just be getting a P0300 DTC, but you can look at the misfire counter and see also.

You use a temp gun and check to see which header tubes are colder than the others.

Reply Subscribe

Reply Share

First
Prev
1 / 1
Next
Last