Make a V8 idle and run. Engine runs, but not perfect. Help!?

For discussing injector selection, manifold modifications, throttle bodies, fuel supply system design and construction, and FIdle valves and IACs.
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abbamust
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Post by abbamust »

this is my last config.

the car will not start :( :( :(

the plugs get wet. I have changed the oil (alot of fuel in the oil).
eliotmansfield
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Make a V8 idle and run... Need help to confiugre the fuel.

Post by eliotmansfield »

have/can you checked that you don't have an injector stuck open or perhaps dribbling?


Posted by email.
Last edited by eliotmansfield on Tue Aug 22, 2006 2:17 am, edited 1 time in total.
Eliot Mansfield
5.7L Twin Turbo Dakar 4x4.
http://www.mez.co.uk
abbamust
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Post by abbamust »

i'm starting to think that there is something wrong with my plugs. i shall buy some new ones, and try again...

eliotmansfield, did you change anyting in the msq-file?
eliotmansfield
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Post by eliotmansfield »

Dont understand why the attachment is there, I haven't touched it. I replied via email on the train this morning, something got crossed somewhere.
(edit: i see what happened, fixed previos post now)
Eliot Mansfield
5.7L Twin Turbo Dakar 4x4.
http://www.mez.co.uk
abbamust
MegaSquirt Newbie
Posts: 10
Joined: Sun Nov 20, 2005 11:02 pm
Location: Norway

Post by abbamust »

got new sparkplugs, and then I was on the road again!!! :P :P

alot of tuning remains, and hopefully, this car will be good to go shortly.


It is abit tricky to start though, and it dies easy when I put it in gear...

Too much or too little fuel? And how to decrease the duty cycle?
abbamust
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Joined: Sun Nov 20, 2005 11:02 pm
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Post by abbamust »

ok...

this is my problem now:
the idle is getting better... it's not as stable as I hoped for, but ok. but when I put it in gear (this is an automatic tranny), it falls to about 600 rpm, and the engine dies after a couple of seconds.

the engine does not take the trottle very vell. and aslo i have some misfires (i beleave...) when I increase the rpm to 2500-3000.

also my IAC does not seem to work as it should. it does not work in revers, it just acts a little funny. on a startup with hot engine, it opes up, and the engine revs up alot. on cld start, it works pretty good.

I's suspecting the engine still goes too rich, but I get no reaction when I adjust the Req_fuel.

I post my msq-file here, so please come with advise.

one last thing, should I have som o2 system installed? what exactly do I need on this V8 engine? what will it cost?


thanks
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