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Author Topic: matts buggy build  (Read 93961 times)

M4wdFab

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Re: matts buggy build
« Reply #585 on: September 25, 2014, 07:40:26 AM »
Friendly reminder to stop ripping car around shop after dark.  I could hear it over my tv last night...
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GBR928

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Re: matts buggy build
« Reply #586 on: September 25, 2014, 07:48:15 AM »

Quote from: M4wdFab on September 25, 2014, 07:40:26 AM
Friendly reminder to stop ripping car around shop after dark.  I could hear it over my tv last night...

Yeah that was me being mad and deciding that flat footing it will fix the issue (never does). I also backed into the side of my trailer. Lol 

Gonna check 02s tonight if problem persists I'm out


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M4wdFab

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Re: matts buggy build
« Reply #587 on: September 25, 2014, 09:30:25 AM »
Not an o2 issue.  Motor doesnt need o2 to run, 571 has raced and wrecked witg none
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mr.mindless

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Re: matts buggy build
« Reply #588 on: September 25, 2014, 09:31:39 AM »
Vacuum leak, fuel pressure issue, coolant temp sensor issue, MAF.

Maybe if the O2 is bad AND lying about values? Unplug it.
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GBR928

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Re: matts buggy build
« Reply #589 on: September 25, 2014, 09:37:09 AM »
Why would it run worse with different wires though? Ran perfect when I first put them on. Pulled out of garage and developed the same miss and got progressively worse


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Ryan

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Re: matts buggy build
« Reply #590 on: September 25, 2014, 10:12:37 AM »
My 6.0 ran like crop because I had the o2 plug in backwards. It does not need them to run but does need proper info if they are hooked up. If you can hook up an obd2 port you could check it with the tech2
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mr.mindless

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Re: matts buggy build
« Reply #591 on: September 25, 2014, 10:20:40 AM »
I really wish I had an OBD II port... That doesn't even make the current todo list though.

If it's that simple, you have a loose/bad wire or broke a plug or have a loose plug or loose top connector on a plug.
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etk300ex

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Re: matts buggy build
« Reply #592 on: September 25, 2014, 10:22:07 AM »
cause its not the wires?
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GBR928

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Re: matts buggy build
« Reply #593 on: September 25, 2014, 10:26:22 AM »
I recently changed plugs and it was fine after. Lasted an RCROCS race and developed again at twisted toys. Been on and off ever since. Seems whenever I fiddle with plugs and wires it'll run ok and then go back to not running on all eight


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mr.mindless

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Re: matts buggy build
« Reply #594 on: September 25, 2014, 10:45:06 AM »
I had the same issue, starting at the line at rcrocs 2. Ran fine before the race, was missing right off the line. found a broken plug and changed it after chasing vacuum leaks fruitlessly. all well after changing plugs until it did it right before line mountain 2. was a loose plug wire. Has been fine since.

YMMV
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Wingman

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Re: matts buggy build
« Reply #595 on: September 25, 2014, 12:07:00 PM »
Coil?
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Re: matts buggy build
« Reply #596 on: September 25, 2014, 12:34:47 PM »
i remember smike having a cracked spark plug.

are you running good plugs?   i have seen crap plugs "leak" the spark to the block

have you ever pulled or replaced the plugs?

does pulling one wire at a time change the engine stumble...   
« Last Edit: September 25, 2014, 12:41:53 PM by gif »
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GBR928

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matts buggy build
« Reply #597 on: September 25, 2014, 01:12:01 PM »
Recently changed the plugs to Denso Platinum. Fixed problem for a race and then came back after rock bouncing. Maybe another is cracked. Have to check I guess. I needed new wires anyway.


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« Last Edit: September 25, 2014, 01:13:37 PM by rockaholic »
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GBR928

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Re: matts buggy build
« Reply #598 on: September 26, 2014, 08:28:16 AM »
Checked all plugs last night, no cracks. Installed my spare o2 sensors as well. Problem persists. Idle and rev runs on all 8, under load at lower rpm is where it stumbles.


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Ryan

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Re: matts buggy build
« Reply #599 on: September 26, 2014, 09:00:20 AM »
Clean the MAF?
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