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Registered:
March 2003
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 UFO 1.5 of 4 cyls firing
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Sun, 08 June 2003 14:05
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22R -> 22RE upgrade 
UNIDENTIFIED FU#$EN ORDEAL! 
Cylinder 1 fires (engine will idle with this one alone), cylinder 4 half firing (engine will eventually die with this one alone).
Occassional backfire type kick through intake system as if a cylinder firing while inlet valve open.
- No ECU error codes (tested with 2 computers).
- Timing set correctly, spark at all plugs, checked, rechecked (tested with 2 distributors, rotors, caps, leads. Ignitor seen running in donor vehicle before purchase. Still my original carby coil {same part# as EFI coil}. Plugs gapped & clean.
- Fuel pressure tested OK, injector plugs pulsing OK, #1 cyl (good) plug swapped onto others cyls, no difference. Removed injectors, tested cyl #2 injector in rail with 12V, full spray into air, confirming fuel pressure also. Will test rest tomorrow, also on lower voltage. If all same/OK, will replace & test engine again.
- Miscellaneous: new oxygen sensor, new fuel filter/pumps, new exhaust system (stock 4-2-1 manifold/headers, new 2.5" cat and muffler), AFM revs engine up like throttle when swinging screen open.
After replacing the injectors tomorrow morning, I'm out of logical ideas. Wondering if anyone has been in similar scenario.
My site for anyone interested in 22R -> 22RE upgrade info is ToyotaTavern.topcities.com - where Torque is usually on tap, but not right now 
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Location:
Perth
Registered:
May 2003
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Re: UFO 1.5 of 4 cyls firing
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Sun, 08 June 2003 16:07
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Sounds like you have exhausted all options with electrical and fuel.
The only three reasons an engine will backfire up the intake are:
1) To far advanced
2) Running very lean (with respect to methanol blown engines)
3) Inlet valve open during ignition
I know that you said that you heard the engine running previously but have you done a dry and wet compression test yet? Or even a cylinder leak down test?
Assuming everything else is ok, it MAY have a bent valve(s)/damaged valve seat(s) or blown head gasket between 2 and 3.
Tell us how you go.
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Location:
Gold Coast
Registered:
January 2003
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Re: UFO 1.5 of 4 cyls firing
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Sun, 08 June 2003 22:00
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what vehicle and year model of the vehicle did you get the injection off? I have done this conversion myself on my 95 hilux. There is differences in the years that is why i am asking.
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Location:
Brisbane
Registered:
December 2002
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Re: UFO 1.5 of 4 cyls firing
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Mon, 09 June 2003 00:36
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Have you done a compression test and checked the valve clearance. your timing might be right going by the timing marks but your cam might be out of wack. One more silly question. have you got the cyliders firing in the right sequence??
Oh One more thing. I had trouble with this once too. I took out the distributor on my engine once and must have put it back in with one cog too advanced. when idling timing was fine but as soon as it advanced it played up. Found out that it the rotor was just sparking the right plug but only just as it was advanced as soon as the vacumm adavance it it started to spark on the next as well. just check that too.
any one more thing. just check that the distributor is not 180 deg out of alignment.
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Registered:
March 2003
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Re: UFO 1.5 of 4 cyls firing
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Mon, 09 June 2003 06:08
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Finished testing the injectors - #2 & #3 were not reliably opening under pressure with low voltage, with no/low pressure they would. With full 12V they all had no problems.
When I replaced them, I put the previously firing cylinders #1 & #4 injectors into #2 and #3 (previously not firing) positions.
Now it runs on cyls #2 & #3, but not #1 and #4 anymore. So great powers of deduction lead me to believe these injectors are faulty.
Coventrys asking $93ea for used recon/tested injectors by ACA. New Bosch are out of my price range. To have mine reconditioned $38ea, now I have to decide.
Fingers crossed now!
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Location:
Gold Coast
Registered:
January 2003
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Re: UFO 1.5 of 4 cyls firing
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Mon, 09 June 2003 06:37
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i have a set of injectors that i will sell you cleaned and tested $100 or without testing $50
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Registered:
March 2003
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no comp, valve seating etc?
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Sat, 14 June 2003 02:53
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thanks, I already got the injectors though
they helped that problem, but still had timing way out problem... tested transformer type coil from starlet and it fired better - didnt need as much advance.
bit the bullet and took it to EFI Autos, there wasnt any major problems - i had forgot to block off the EGR port on plenum chamber!!! it faces the firewall as well so out of sight/out of mind. They adjusted the TPS they said and now its idling OK, but its not right.
they did compression check, and #2 cylinder is showing almost nothing. i thought its strange because it was running on #2 cylinder alone a couple days earlier (with full advance and more throttle, while still had EGR port unblocked etc).
he said check your clearances (going to do that now), and that it may be a valve not seating properly. He also said that because its been sitting for almost a year, it may need some running to free it up if it is sticking... otherwise take the head off to have it looked at.
its scary and real demoralising to have no compression in #2, it doesnt hesitate through underload/revving out, but it is rougher at idle than what it should be.
I used Nulon Engine Oil Flush yesterday before dropping the oil, first two benefits it claims are:
1) Helps free up sticky valve lifters
2) Cleans & removes sludge, dirt & varnish
sounds good to me, fingers crossed its that simple!
thanks again,
David.
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Location:
Brisbane
Registered:
June 2003
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Re: no comp, valve seating etc?
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Sat, 14 June 2003 05:33
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so did anything else come from the compression test? My mate had the same problem with a mazda 626 and also a ford econovan - they ended up being blown head gaskets...id look more into that..
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