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EFI VK missing on 1 cyl?

EFIVK6

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Hey guys. I have a EFI VK 202 and its missing on cylinder 2, no matter what i try i cant seem to get rid of it, ive replaced the plugs, leads, dizzy cap, rotor button and injectors but still hasnt fixed the problem. That said if i pull the injector connection off #2 it changes nothing at all, have tested the connection and its working just like the rest.

Anybody got any ideas on what it might be?
 

Cheap6

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An engine mechanical fault? Maybe worn cam lobe or piston not sealing?

Re. the injector connection: did your check involve seeing that the voltage drops on the earth side of the injector with the engine running?
 

vkberlina

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It should be right between Cyls 1 & 3 if your looking :p sorry couldnt resist.
So your missing 3 cylinders now :)

Ok seriously now...

Ok so your saying you have check the injector plug and your seeing an injection pulse? Tested with a test light??

Have you pulledthe spark plug out and checked it?

Have you done a compression test?

Scott
 

Growler71

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It should be right between Cyls 1 & 3 if your looking :p sorry couldnt resist.
So your missing 3 cylinders now :)

Ok seriously now...

Ok so your saying you have check the injector plug and your seeing an injection pulse? Tested with a test light??

Have you pulledthe spark plug out and checked it?

Have you done a compression test?

Scott

X2 do a comp test you could have a buggered valve
 

Darren_L

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if you are going to test an injector lead with a test light, make sure the test light has an internal resistor or an LED type, or you will risk frying your ECU
as suggested above, do a compression test
if the compression is down, could be a broken valve spring, worn cam lobe, burnt valve
 

Growler71

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If you do a compression test and a cylinder fails, add a cap of engine oil to the dodgy cylinder and test again. If the compression comes up it indicates stuffed rings, if it doesn't its most likely valves
 

EFIVK6

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It should be right between Cyls 1 & 3 if your looking :p sorry couldnt resist.
So your missing 3 cylinders now :)

Ok seriously now...

Ok so your saying you have check the injector plug and your seeing an injection pulse? Tested with a test light??

Have you pulledthe spark plug out and checked it?

Have you done a compression test?

Scott

:rofl2:

Have checked and replaced plugs, injector wire was tested with a test light and also on the #1 injector, compression test all 6 cyl tested about the same and a leak test showed nothing.

Could it possibly be a vacuume hose on in the wrong place behind the heater control unit?
 

vkberlina

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Ok so with the new plugs in my original question still stands.

what does the plug look like after its had a run?

A vacumn line wont cause a miss on one cylinder, you may have just mis diagnosed and have a vac leak which will make it sound rough.
You may also have a dud lead, this can be checked b swapping with another lead. You need t swap i on the dizzy as well.
You may also have a dizzy cap & rotor button problem or even a dizzy fault.

First we need to know what the plug looks like
 

EFIVK6

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All but #2 are clean, #2 is all black
 

drippy

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Have you tried swapping the injectors around? Mite be a dud injector

Sent from my HTC_PN071 using Tapatalk 2
 
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