1Y starting problems

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poofit
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1Y starting problems

Post by poofit »

Hi all! 

Long time lurker here! Recently had the van booked in for a service but they couldn't do it due to it had a fuel leak from the injection pump. I've pulled it off to replace the front seal of the pump which wasn't that difficult. Whilst the pump was off decided to replace cambelt as history is unknown and looked worse for wear. However, after putting it all back together and redoing the timing belt. It refuses to start. 

My engine is a 1Y out of a golf mk3. I've searched the forum and tried a few things but with no luck.

I've been through everything and it all checks out. I can see the fuel isn't reaching the injectors so that will be my issue. I've bled the pump and its full with fuel but no fuel is getting through to the injectors. 

Things I've tried/checked
  • Refilled and bled the pump and now has no air.
  • I've checked the start/stop solenoid clicking.
  • Checked the timing and all checks out (Injection pump locking pin slides in to slot on the pulley, TDC mark on the flywheel, cam locking tool easily fits in the back, and the lobes on cam on piston 1 are up in the air).
  • Tried cracking the injector unions loose to see if fuel comes out whilst cranking but no luck.
  • If I pull out the timing bolt out the back of the pump and crank the engine, fuel comes out the back. 
  • New battery and checked connections to starter motor.

The fuel pump was in full working order before taking it off. Just had a nasty fuel leak at the front seal. I'm out of ideas on what it could be. Any ideas or suggestions would be greatly appreciated.  :shock: :oops:

clone123
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Re: 1Y starting problems

Post by clone123 »

Have you change the diesel filter I had similar problem I thought the diesel lines was full of diesel but in fact it was full of air and no diesel so it look like there's no air bubbles in try a gravity feed first if that works its probably the fuel filler valve

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ajsimmo
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Re: 1Y starting problems

Post by ajsimmo »

Try a squeeze bulb type priming pump between filter and pump. That'll pressurise the pump and expel any remaining air out of the top banjo/return line to tank. When the wife's front seal had gone this was my workaround. Now fixed, it starts on the button.

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poofit
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Re: 1Y starting problems

Post by poofit »

Hi! I thought I replied! I've tried both of those with no luck! I've primed the pump and when I crank the engine over with the return line open fuel pours out. I've even pulled the shutoff solenoid plunger out but still not fuel to injectors. Pretty much out of ideas at this point on what it could be

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muttleypup
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Re: 1Y starting problems

Post by muttleypup »

just a thought, you say you loosened/cracked open the unions at the injectors, all at once or one at a time starting with cylinder 1?
1987 single cab pickup 1.9 1Y

davidoft1
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Re: 1Y starting problems

Post by davidoft1 »

how long have you been turning the engine over for constantly?
 

poofit
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Re: 1Y starting problems

Post by poofit »

muttleypup wrote: 25 Oct 2020, 17:45 just a thought, you say you loosened/cracked open the unions at the injectors, all at once or one at a time starting with cylinder 1?

Have to admit, I did crack them all loose all at once :) 

poofit
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Re: 1Y starting problems

Post by poofit »

davidoft1 wrote: 25 Oct 2020, 18:35 how long have you been turning the engine over for constantly?


I would say maybe a few minutes? 20 seconds on then leave it a bit then go again

colinthefox
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Re: 1Y starting problems

Post by colinthefox »

poofit wrote: 25 Oct 2020, 20:59
muttleypup wrote: 25 Oct 2020, 17:45 just a thought, you say you loosened/cracked open the unions at the injectors, all at once or one at a time starting with cylinder 1?

Have to admit, I did crack them all loose all at once :) 
You should start with at least three open at once, so all of them loose is OK. When cranking with the injectors cracked open, did you have the throttle wide open, then tighten the injectors one by one while still cranking?
 
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poofit
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Re: 1Y starting problems

Post by poofit »

colinthefox wrote: 25 Oct 2020, 21:08
poofit wrote: 25 Oct 2020, 20:59
muttleypup wrote: 25 Oct 2020, 17:45 just a thought, you say you loosened/cracked open the unions at the injectors, all at once or one at a time starting with cylinder 1?

Have to admit, I did crack them all loose all at once :) 
You should start with at least three open at once, so all of them loose is OK. When cranking with the injectors cracked open, did you have the throttle wide open, then tighten the injectors one by one while still cranking?

Okie dokie! I didn't do that. I just cracked them all loose and kept cranking. I filled the pump up also so it was overflowing out the top of the return
 

poofit
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Re: 1Y starting problems

Post by poofit »

Finally got the van idling after re-doing the timing. However, the idle goes from smooth to rough. Any load the engine stalls itself, seems to be a fuel problem. The timing is dead on with all the locks in place but I can't think what else it could be :( 

clone123
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Re: 1Y starting problems

Post by clone123 »

Not sure if this well help but you said all your timing makes are right but no mention of the what you have set your pump lift to

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