Running poorly after fuel line replacement, Seafoam? SOLVED

[Ahwahnee]

Print that, cut it out and stick it on the lid of the AFM:

I never trust my memory and also know I made need that info some rainy night when I am tired & wet.

[dhaavers]

x2...BTDT...



- Dave
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86 White Wolfsburg Westy Weekender
"The WonderVan"
<EDITED TO PROTECT INNOCENT PIXELS>

[vwrhodie]

[vwrhodie]

[vwrhodie]

[vwrhodie]

Welp, just replaced spark plugs/ignition cables/distributor cap/roter/air filter/o2 sensor and fired her up... still same issue. Definite misfire in one of the cylinders on the right side of the engine bay. the van fires up without issues but begins to misfire after idling for a while. I hear a weird noise too. I want to check the compression but I am at the point where I want to take her into a shop. I am very apprehensive about doing so and thats why I uploaded these videos so that maybe you guys can help.

My neighbor upstairs likes to see what I am doing with the van when he drives by, this time he helped me a ton! That is his voice and arm in the video. Hes a pipe fitter and has tons of tools and gadgets that made this tune up so much easier. Here it is at idle:


Link


Here it is when accelerating:


Link


There arent any trustworthy mechanics near me so I want to chase every tiny thing I can check/change before I throw my hands up and let a shop rip me off. Thank you guys in advance for taking the time to help me out!
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'68 Beetle 2005-2011
'81 Rabbit 2011-2013
'85 VanagonGL 2018
'84 Rabbit Turbo Diesel 2021

[11BC2]

The first video, under the black box, is that an injector?
Something doesn’t look right, but then again, I’ve been drinking Salva Vida all day in Honduras.
Don’t judge.

[11BC2]

Ok.... I posted too soon... have you determined which cylinder is having fits?
Are all the electrical connectors on the injectors on tight?
Pull each one off... one at a time...tense which cylinder is not participating.

[11BC2]

Ok.... I posted too soon... have you determined which cylinder is having fits?
Are all the electrical connectors on the injectors on tight?
Pull each one off... one at a time...tense which cylinder is not participating.

[11BC2]

The first video, under the black box, is that an injector?
Something doesn’t look right, but then again, I’ve been drinking Salva Vida all day in Honduras.
Don’t judge.

[vwrhodie]

[HBB]

[mikemtnbike]

Like Dave said...changing fuel lines effected running, seems like it's misfiring after...how are these things connected?

Look at your fuel injectors. Is one not plugged in right? Or, is one not seated right creating a big old vacuum leak? Did you replace the O-rings on the injectors when you did the lines?
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1991 Vanagon GL 2.1 AT Westfauxlia. "Frankie" Totaled https://www.thesamba.com/vw/forum/viewtopic.php?t=764510&highlight=carnage
1995 Eurovan Camper "Marzivan"
2020 GTI SE manual

[MsTaboo]

[Buggeee]

In addition to checking for loose stuff and unplugged stuff, and putting in new fuel injector seals if you haven't already (set is 5 bucks)...

You can use a $10 automotive stethoscope to listen to each injector to see if it is opening and closing like the others. YouTube videos for any kind of car will instruct.

You can use a $22 noid light kit to see if the injector plugs are providing the flashing signal to each injector. Pull the plug from an injector, and plug the light into the plug. Bentley tells the procedure.

You can use a $35 multi-meter and your Bentley Manual to roll through a very thorough, and easy, diagnosis of every part of your fuel injection system in under an hour.

We are kind of on the same time-table with fuel lines and casting out demons so thought I'd share some thoughts.

Keep kickin' Ass.
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1966 Sportsmobile Camper https://www.thesamba.com/vw/forum/viewtopic.php?t=...mp;start=0
72 Super Duper http://www.thesamba.com/vw/forum/viewtopic.php?t=672387
(adopted out) 61 Turkis Pile https://www.thesamba.com/vw/forum/viewtopic.php?t=728764

[Buggeee]

[vwrhodie]

[Igeo]

Yes.
Your video shows us that you have a miss in one cylinder. You can isolate the bad one by going through this test. To make it easier, before you start the engine, loosen the wires at the cap a little to break the grip of the boots. Push them back on enough to make contact though. That way it's easy to pull them one at a time and replace.

The video sounds more like a compression leak to me.... like a loose spark plug. Or has it had a known exhaust leak the whole time? Anyway, once you find which cylinder is the culprit, check that plug. Pull it out and post a photo.

[vwrhodie]

[Igeo]

You do need to verify that the seal isn't stuck in the hole/misaligned or missing.
If the injector doesn't seal, that cylinder will suffer.