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OMVL + Manual = Weirdness 

 

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 Post subject: OMVL + Manual = Weirdness
Posted: Tue Feb 27, 2007 4:31 pm 
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Ok campers,

I have an omvl gas system, was running a bit funky (with the auto), so i followed the tuning guide here (after converting to manual). Got it to idle very well. I have also converted to a manual setup, not running a manual ecu, so it is tricked into thinking it is in neutral.

Problem No 1.

idles fine,
runs at highway speeds ok, but seems to stop suppling gas after 10mins (at highway speed), just gets really spluttery and looses speed, causing me to switch to petrol and gaining all power again.

Problem No 2.

this one has me stumped, car idles fine (have tried a fair few sensitivity srew settings), it free revs fine, but put it in gear and start to release clutch and it gets REALLY spluttery like there is SFA gas going through, and doesnt go anywhere.

any help would be great, as im now doing 80km each way to uni 4 days a week i need it running on gas.

p.s. sorry for the essay ;)

Cheers,
Rushed

 

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Posted: Tue Feb 27, 2007 9:00 pm 
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I'd be checking the filter in the lock off.
Also, is it a brand new convertor?
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Posted: Tue Feb 27, 2007 10:06 pm 
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filter in lock off? i assume that in-between the convertor and mixing ring?

nope still an old a** convertor, prob still going to get a new one soon ;), but just need it working till i have the spare cash to do so.

 

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Posted: Tue Feb 27, 2007 10:23 pm 
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rushed wrote:
filter in lock off? i assume that in-between the convertor and mixing ring?

nope still an old a** convertor, prob still going to get a new one soon ;), but just need it working till i have the spare cash to do so.
Normally there is a sintered bronze or mesh filter preceeding the convertor to remove any nasties before they can enter the convertor.

 

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Posted: Tue Feb 27, 2007 10:45 pm 
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It will either be bronze or a paper filter.
I'll try grab a pic as i have a lock off that's removed from the car.
If that turns out ok then i'd definately be taking a good look at your convertor.
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Posted: Wed Feb 28, 2007 12:53 am 
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One simple thing i totally over looked and that's water flow, as soon as she starts to run s**t, pull over and see if the convertor is hot.
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Posted: Wed Feb 28, 2007 3:19 pm 
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hot as hell, but it has all new hoses, unless theres an internal blockage?

 

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Posted: Wed Feb 28, 2007 5:19 pm 
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Hot is good. Cold is bad. If it gets too cold the convertor will freeze and the car will run s**t/stop.

cheers
Scott

 

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Posted: Thu Mar 01, 2007 12:39 am 
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That's one thing illiminated.
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Posted: Fri Mar 02, 2007 12:53 pm 
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this "filter" is assue your saying its in the lock-off inbetween the gas tank and convertor?
or the one between the convertor and the throttle?

any help would be great as not having gas is killing me.

 

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Posted: Fri Mar 02, 2007 4:11 pm 
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The lock off is usually within 6 inches of the convertor. The gas line from the tank runs upto the lock off, then it runs to the convertor.
There is no lock off between the convertor and the TB.
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Posted: Fri Mar 02, 2007 4:18 pm 
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hrmm, how do i attack it? ill try to get a pick up in a few mins

p.s. i have a electric switch inbetween the convertor and tb.

 

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Posted: Fri Mar 02, 2007 4:28 pm 
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ok pics,

1st, convertor lockoff? to the right
2nd close off lockoff
3rd unknown lockoff

edit, gah it uploaded backwards reverse order

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Posted: Fri Mar 02, 2007 4:37 pm 
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The first pic is the servo or stepper motor not a lock off. Picture 2 looks like the filter below (to the left of) the lockoff solenoid.

 

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Posted: Fri Mar 02, 2007 5:06 pm 
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Number 2 is the one your after. Undo the bolt underneath and the bowl and filter will come out. Have a look at the bottom of the bowl to see how much s**t the filter actually pulls out.
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