L98 running like crap. looking for ideas
Thread Starter
Racer
Joined: Jun 2007
Posts: 486
Likes: 0
From: Sandy Ut
L98 running like crap. looking for ideas
On the way home from work my convertible Vette. Felt like it was only running on 6 cyliders. Well I make an assumption that it was a plug wire or bad plug so after work today I changed all the plugs and chased the wires. Fired it up and it still feels like it is missing bad and has no power. No codes and it smells rich. Any ideas?
Safety Car
Joined: Jul 2006
Posts: 3,696
Likes: 1
From: MA
On the way home from work my convertible Vette. Felt like it was only running on 6 cyliders. Well I make an assumption that it was a plug wire or bad plug so after work today I changed all the plugs and chased the wires. Fired it up and it still feels like it is missing bad and has no power. No codes and it smells rich. Any ideas?
At least you dont have to deal with a Optispark
heres the reason mine was missing
128K Later
Max G’s
Joined: Nov 2008
Posts: 2,751
Likes: 79
From: Monroe OH
NCM Sinkhole Donor
On the way home from work my convertible Vette. Felt like it was only running on 6 cyliders. Well I make an assumption that it was a plug wire or bad plug so after work today I changed all the plugs and chased the wires. Fired it up and it still feels like it is missing bad and has no power. No codes and it smells rich. Any ideas?
Le Mans Master
Joined: Jan 2003
Posts: 5,858
Likes: 7
From: Santa Maria CA
If this is a consistent miss (not a random miss) that follows RPM disconnect either a spark plug wire or an injector plug one at a time. If you disable a cylinder and there is no change in the engine sound that cylinder is not contributing to power.
With a mechanic's stethoscope you can listen to each fuel injector while the car is running and clearly hear the inside pintle slamming open and closed when it's spraying. Any silent injectors should be ohm checked. Spec is 16 ohms plus/minus a couple ohms. I got my stethoscope at Harbor Freight for about $5. It works great.
You can also grab a basic inductive timing light and connect it to each of the 8 plug wires one at a time. If there is spark going though the wire the timing light will flash. If no spark it will not flash. Did you replace the plug wires?
I would also look at the inside terminals of the cap as mentioned.
With a mechanic's stethoscope you can listen to each fuel injector while the car is running and clearly hear the inside pintle slamming open and closed when it's spraying. Any silent injectors should be ohm checked. Spec is 16 ohms plus/minus a couple ohms. I got my stethoscope at Harbor Freight for about $5. It works great.
You can also grab a basic inductive timing light and connect it to each of the 8 plug wires one at a time. If there is spark going though the wire the timing light will flash. If no spark it will not flash. Did you replace the plug wires?
I would also look at the inside terminals of the cap as mentioned.
Last edited by 86PACER; Jun 19, 2011 at 01:46 AM.
