V8S misfire/ hesitation
Discussion
My V8S has picked up a misfire/ hesitation. It is not always there, but then can be there for the day.
Accelerate and she pulls normally, and then hesitates like I lifted off the throttle and then slapped down the accelerator again, and she pulls like normal. A passenger does be thinking WTF are you doing as their head snaps forward and back!
Here she is running on a constant throttle on the motorway, and I could feel the miss. But then I noticed that the tacho needle jumps forwards and backwards during these misses.
This is on a constant throttle, and the engine's actual rpms are not jumping around. But I can feel the miss. Any ideas of first port of call to check? Electrical issue I would guess.
Accelerate and she pulls normally, and then hesitates like I lifted off the throttle and then slapped down the accelerator again, and she pulls like normal. A passenger does be thinking WTF are you doing as their head snaps forward and back!
Here she is running on a constant throttle on the motorway, and I could feel the miss. But then I noticed that the tacho needle jumps forwards and backwards during these misses.
This is on a constant throttle, and the engine's actual rpms are not jumping around. But I can feel the miss. Any ideas of first port of call to check? Electrical issue I would guess.
Edited by Beast Master on Monday 13th March 16:27
It seems to always be between 2500 to 3500 rpm. Outside of that it seems fine. And some days will be fine, and then others can be worse. If it were leads etc. I would expect it to be across the full rev range. Throttle pot? I'll do some reading on that.
No, I didn't remove the yellow connector. Is there a thread on here to teach me more about that?
Thanks for the reply.
No, I didn't remove the yellow connector. Is there a thread on here to teach me more about that?
Thanks for the reply.
As an update to this, I have a new coil, ignition amplifier, plug lead set, Anderson connectors all on order. While waiting for them to arrive, I did the running the car in pitch darkness in the garage test, and I could see no arcing whatsoever.
I removed all of the HT leads and examined them. They are only about 2 years old and all look brand new. No burning or damage. I reinstalled them, but rerouted them so that no lead touches any metal work. I then cleaned and reseated the terminals on the ignition amp and coil.
And.......the car now runs sweet as a nut! The mis is completely gone. I should have started with the basics first, but the fact that it seemed rev range dependant, and then developed to be across the full rangle threw me. Anyway, the last two days she has been running beautifully.
I removed all of the HT leads and examined them. They are only about 2 years old and all look brand new. No burning or damage. I reinstalled them, but rerouted them so that no lead touches any metal work. I then cleaned and reseated the terminals on the ignition amp and coil.
And.......the car now runs sweet as a nut! The mis is completely gone. I should have started with the basics first, but the fact that it seemed rev range dependant, and then developed to be across the full rangle threw me. Anyway, the last two days she has been running beautifully.
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