Can’t figure out the problem

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Jan 25, 2025 | 07:36 AM

Larryls400

Thread Starter

2nd gear

Joined: Jan 2025

Posts: 2

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Can’t figure out the problem

Was coming out of a parking lot and tried to accelerate and my car lost power similar to when you run out of gas and the exhaust started sounding like it was running on less cylinders and and was struggling to accelerate even with the pedal to the floor it wouldn’t go above 30mph so I limped it home about a 10 minute drive I let it sit and and tried to start it again later and got the same result exhaust sounding it was a go kart and would struggle to accelerate to 30 I’ve changed spark plugs air filter and disconnected the 02 sensors to see if that was the problem but I’m still getting the same problem has anyone else ever experienced this or has fixed someone’s car that was acting the same?
I have a video posted of how it sounds

Attached Files

IMG_1527.mov (18.32 MB, 16 views)

Last edited by Larryls400; Jan 25, 2025 at 07:38 AM.

Jan 25, 2025 | 09:58 PM

94V8coupe

Pit Crew

Joined: Mar 2013

Posts: 220

Likes: 27

From: Ontario

I'm betting one of your ignition coils **** the bed.
Not uncommon at all.

Jan 25, 2025 | 09:59 PM

CELSI0R

Racer

Joined: Nov 2015

Posts: 1,788

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From: NJ

Do you have a strong smell of gas? Any codes?

Has your ECU been checked? Did the capacitors fail?

You can start some diagnostics on the ignition system...
https://www.clublexus.com/forums/ls-...l#post11652230

And pull the ECU to check its condition

There is a chance it is something like a dead coil, but you have to perform some analysis to get to that conclusion

Jan 25, 2025 | 10:07 PM

94V8coupe

Pit Crew

Joined: Mar 2013

Posts: 220

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From: Ontario

Quote:

Originally Posted by CELSI0R

There is a chance it is something like a dead coil, but you have to perform some analysis to get to that conclusion

That would be the very first thing you check because it takes about 1 minute to do.
BEFORE pulling the entire passenger side under-dash out to crack open the computer

Just sayin'.

Jan 26, 2025 | 08:33 AM

CELSI0R

Racer

Joined: Nov 2015

Posts: 1,788

Likes: 412

From: NJ

Quote:

Originally Posted by 94V8coupe

That would be the very first thing you check because it takes about 1 minute to do.
BEFORE pulling the entire passenger side under-dash out to crack open the computer

Just sayin'.

My post says to check the coil and the ECU in exactly that order for precisely that reason

Quote:

You can start some diagnostics on the ignition system...
https://www.clublexus.com/forums/ls-...l#post11652230

And pull the ECU to check its condition

My point in mentioning the ECU is to avoid parts swapping, and that it can be multiple factors. Could also be a failed igniter, rotor, distributor, etc etc..

My post that I linked shows how to test the coils and igniters

Last edited by CELSI0R; Jan 26, 2025 at 08:34 AM.