Yaris 1.0 2000 misfire

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Yaris 1.0 2000 misfire

Yaris 1.0 2000 misfire

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rob
Senior Member

720

12-07-2023, 01:24 PM

#1

Hi all..

Fault light came on this morning.. fault code is cylinder 1 misfire.

I swapped the coil packs.. stays on cyl 1. Swapped the plugs and stays on cyl 1.

Anyone had similar problem?

I have to check the wiring harness next.

rob

12-07-2023, 01:24 PM #1

Hi all..

Fault light came on this morning.. fault code is cylinder 1 misfire.

I swapped the coil packs.. stays on cyl 1. Swapped the plugs and stays on cyl 1.

Anyone had similar problem?

I have to check the wiring harness next.

rob
Senior Member

720

12-07-2023, 02:25 PM

#2

It's not the plugs or the coil pack.. The plug also sparks... mmmmmm deeper troubles ahead!!

Anyone got a link for an engine repair manual?

rob

12-07-2023, 02:25 PM #2

It's not the plugs or the coil pack.. The plug also sparks... mmmmmm deeper troubles ahead!!

Anyone got a link for an engine repair manual?

Sparkystav
Administrator

14,683

12-07-2023, 06:02 PM

#3

Hmm could be the ecu, a part broken, hopefully just a broken wire!

[Image: LexuS-Copy.jpg]

Read my thread here: The Evolution of my Turbo Lexus from NA-Supercharged-Twin Turbo-Massive Single
Please leave your comments.

OutlawJapClub Admin Team

Sparkystav

12-07-2023, 06:02 PM #3

Hmm could be the ecu, a part broken, hopefully just a broken wire!

[Image: LexuS-Copy.jpg]

Read my thread here: The Evolution of my Turbo Lexus from NA-Supercharged-Twin Turbo-Massive Single
Please leave your comments.

OutlawJapClub Admin Team

rob
Senior Member

720

13-07-2023, 02:45 AM

#4

Yep that's what I'm hoping... I will try get a compression test today then it rules out the mechanical part. It's only done 50k miles so shouldn't be valves but never know.

rob

13-07-2023, 02:45 AM #4

Yep that's what I'm hoping... I will try get a compression test today then it rules out the mechanical part. It's only done 50k miles so shouldn't be valves but never know.

Sparkystav
Administrator

14,683

13-07-2023, 09:43 AM

#5

Surely wouldn't show a code if a mechanical issue?

[Image: LexuS-Copy.jpg]

Read my thread here: The Evolution of my Turbo Lexus from NA-Supercharged-Twin Turbo-Massive Single
Please leave your comments.

OutlawJapClub Admin Team

Sparkystav

13-07-2023, 09:43 AM #5

Surely wouldn't show a code if a mechanical issue?

[Image: LexuS-Copy.jpg]

Read my thread here: The Evolution of my Turbo Lexus from NA-Supercharged-Twin Turbo-Massive Single
Please leave your comments.

OutlawJapClub Admin Team

rob
Senior Member

720

13-07-2023, 01:36 PM

#6

Compression test results... ZERO compression on cylinder 1.... ****!

The system is obviously smarter than I am.. not sure what it's picking up or from where.

I did notice it was down on power a few months ago but put it down to 40c and air con on.. I guess that was the start of it. I'm hoping it's just a burnt valve. I will get a boroscope in there tomorrow morning hopefully it should be obvious. Hoping it's not rings etc.

rob

13-07-2023, 01:36 PM #6

Compression test results... ZERO compression on cylinder 1.... ****!

The system is obviously smarter than I am.. not sure what it's picking up or from where.

I did notice it was down on power a few months ago but put it down to 40c and air con on.. I guess that was the start of it. I'm hoping it's just a burnt valve. I will get a boroscope in there tomorrow morning hopefully it should be obvious. Hoping it's not rings etc.

Sparkystav
Administrator

14,683

14-07-2023, 08:31 AM

#7

gutted mate, hope its not too bad a fix

[Image: LexuS-Copy.jpg]

Read my thread here: The Evolution of my Turbo Lexus from NA-Supercharged-Twin Turbo-Massive Single
Please leave your comments.

OutlawJapClub Admin Team

Sparkystav

14-07-2023, 08:31 AM #7

gutted mate, hope its not too bad a fix

[Image: LexuS-Copy.jpg]

Read my thread here: The Evolution of my Turbo Lexus from NA-Supercharged-Twin Turbo-Massive Single
Please leave your comments.

OutlawJapClub Admin Team

rob
Senior Member

720

14-07-2023, 10:54 AM

#8

It's a good days work but I'm going to strip the head fully and get it in the ultrasonic cleaner so takes but longer.

rob

14-07-2023, 10:54 AM #8

It's a good days work but I'm going to strip the head fully and get it in the ultrasonic cleaner so takes but longer.

rob
Senior Member

720

15-07-2023, 11:26 AM

#9

Quick look inside reveals the problem... also some slight burning on number 4.

[Image: f82c32717fdeecf02af183d0ee70bf3d.jpg]

[Image: f82c32717fdeecf02af183d0ee70bf3d.jpg]

rob

15-07-2023, 11:26 AM #9

Quick look inside reveals the problem... also some slight burning on number 4.

[Image: f82c32717fdeecf02af183d0ee70bf3d.jpg]

Sparkystav
Administrator

14,683

15-07-2023, 01:41 PM

#10

Not good!

[Image: LexuS-Copy.jpg]

Read my thread here: The Evolution of my Turbo Lexus from NA-Supercharged-Twin Turbo-Massive Single
Please leave your comments.

OutlawJapClub Admin Team

Sparkystav

15-07-2023, 01:41 PM #10

Not good!

[Image: LexuS-Copy.jpg]

Read my thread here: The Evolution of my Turbo Lexus from NA-Supercharged-Twin Turbo-Massive Single
Please leave your comments.

OutlawJapClub Admin Team

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