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New engine. Cyl 1 makes no difference. How to diagnose? 

 

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 Post subject: New engine. Cyl 1 makes no difference. How to diagnose?
Posted: Sat Jun 18, 2011 4:07 pm 
Getting Side Ways
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Ride: BA XR6T (mix of BA, BF and FG)

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Just got my new engine finished and put it in, set the timing etc etc... it runs.. but only on 5 cylinders.. no 1 makes no difference if the lead is on or off..

I know #1 has a spark as I used it to set the timing... I also tried a different lead and a sparkplug I know works fine from my old engine.. but no difference if the lead is on or off. I also put the brand new plug in the lead and earthed out outside the engine and it sparked fine.

I did have the injectors out and I thought maybe it's not getting any fuel.. but I put a screw driver on the side of the injector and put my ear to it.. and it's clicking over just like the others but that doesn't mean there isn't a chunk of dirt stuck in it or something.

Lastly I also tool the spark plug out and started it with nothing in #1 and it made a huge racket sucking and blowing so I don't have a ruddy great hole in a piston or anything. (but I guess still possibly a snapped rocker?)

Can anyone suggest anything to help diagnose? The spark plugs have come out dry.. so I'm tipping towards a blocked injector.. but I don't want to do a lot of unnecessary work if there is an any way to find out what the problem is.

thanks muchly.

cheers

Frank
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 Post subject: Re: New engine. Cyl 1 makes no difference. How to diagnose?
Posted: Sat Jun 18, 2011 4:10 pm 
Getting Side Ways
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take rocker cover off and try wriggle rockers around. if thers a broken vlalve ther will be one that mooves all over the place.

also try switching injectors. eg. cyl #1 swap with cyl#3?.. if no3 stops working for some strange reason well you might hav your answer.

 

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 Post subject: Re: New engine. Cyl 1 makes no difference. How to diagnose?
Posted: Sat Jun 18, 2011 4:36 pm 
Getting Side Ways
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Age: 45

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Joined: 23rd Dec 2007

Gallery: 32 images

Ride: BA XR6T (mix of BA, BF and FG)

Location: Perth
WA, Australia

LOL.. .just realised how silly I am..

My car is dual fuel.. if I want to rule out the injectors, I can just start it on gas.... going to try that now.
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 Post subject: Re: New engine. Cyl 1 makes no difference. How to diagnose?
Posted: Sat Jun 18, 2011 4:53 pm 
Getting Side Ways
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Age: 45

Posts: 3440

Joined: 23rd Dec 2007

Gallery: 32 images

Ride: BA XR6T (mix of BA, BF and FG)

Location: Perth
WA, Australia

YES!!!!

Thank christ for that.. really didn't want to get the tappet cover off again as it's perfect with no leaks and spotlessly clean and fully re-assembled...

Runs sweet on gas.. and since I could hear the injector clicking ok, that means it isn't electrical and I just have a blocked injector.

not a biggie as I run gas all the time normally anyway.. but I have a box of spare injectors here I can use....
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