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> fuel starvation while turning, it never freaking ends....
nebreitling
post Mar 19 2004, 05:06 PM
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when i throw the car into moderately long, hard, and sustained turns, the engine feels like it is starved for fuel. it will never die, simply it loses almost all power until i straighten out.

what i've done:

-checked timing (fine)
-fuel pressure at 30 psi
-new fuel filter

obviously, i can't check the fuel pressure while turning (actually, maybe that's not so obvious. i could probably rig a hose into the cockpit....) -- it just feels like fuel starvation..

any ideas? thanks,

nathan

ps car is a 75 2.0 (Djet)


btw, i'm open to the possibility that this may not be a fuel delivery problem, but i recently went through the ignition system, installed a crane xr700, cleaned up grounds, new FI points, etc.
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TheCabinetmaker
post Mar 19 2004, 05:16 PM
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Is this a new problem since you upgraded the ignition system?
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nebreitling
post Mar 19 2004, 05:27 PM
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good question. the answer is:

i don't know.

i upgraded the ignition and changed the FI trigger points at the same time because the car started running horribly. now it runs like a champ in a straight line, coughs in the corners.
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Jeffs9146
post Mar 19 2004, 05:45 PM
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Maybe something in the tank? Low oil pressure? Bad ground on fuel pump? Loose wire on Ign?

???? (IMG:style_emoticons/default/confused24.gif)

Jeff
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nebreitling
post Mar 19 2004, 06:44 PM
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okay, it's not a dip in fuel pressure that's causing this. (you do NOT want to know what i just did to check this (IMG:style_emoticons/default/cool.gif) ). checked the grounds and relays and such. ditto on the fuel pump ground. all good, didn't fix the prob. tank is totally clean, the fuel filter i replaced today was spotless when i cut it open. no hoses kinked...

i'm gonna pull that rat's nest i call my FI harness and clean it up. i'll get to the bottom of it yet..
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Bruce Allert
post Mar 19 2004, 07:32 PM
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QUOTE(nebreitling @ Mar 19 2004, 04:06 PM)
when i throw the car into moderately long, hard, and sustained turns,
btw, i'm open to the possibility that this may not be a fuel delivery problem,

So, it's both, right & left turns?

.......b
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nebreitling
post Mar 19 2004, 07:39 PM
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WELL, as of my last test drive, i can only replicate the effect in a left turn. which, to my probably-over-simplistic understanding of things, suggests that i should look for connections that may be getting loose given inertia to the right. (total shadetree, here)

also, i was able to replicate it in a parking lot with a sustained loop (again, to the left). after feeling it for a while, it feels more like one cylinder is missing... this also explains why it will never stall. i'm about to go back outside and check the FI connections...
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TheCabinetmaker
post Mar 19 2004, 07:40 PM
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Nathan, I know this sounds crazy, but, have you checked the air filter? A clogged one drove me nuts for a few months. going up hill,just die, turning right, just die. replaced filter, no more just die.

Curt
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nebreitling
post Mar 19 2004, 07:52 PM
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hell, nothing's too crazy in troubleshooting. that's not it, though, just replaced the air filter... (K+N baby! that atleast good for another 0.45 hp!)
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TheCabinetmaker
post Mar 19 2004, 07:55 PM
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QUOTE(nebreitling @ Mar 19 2004, 07:52 PM)
(K+N baby! that atleast good for another 0.45 hp!)

LMAO (IMG:style_emoticons/default/laugh.gif)
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SirAndy
post Mar 19 2004, 09:21 PM
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cylinder head temp sensor is loose (or the connector to it) ... (IMG:style_emoticons/default/wink.gif)
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Bruce Allert
post Mar 19 2004, 11:36 PM
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(IMG:style_emoticons/default/agree.gif) w/ Andy
OR...
check the connection to the AAR. If that's getting a "slight" short (slight or intermittant exposure of a bare connector/wire) it can give problems with power loss as it vibrates or moves across an area.

.......b
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John
post Mar 19 2004, 11:58 PM
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what kind of turn? A sustained high speed turn? Is this a new problem? If it is only in sustained high speed turns, possibly it is a reduction or loss of oil pressure due to the oil running away from the pick-up tube. Do you hae a "deep sump" or anything special at the pick-up?

Are all your fuel hoses anchored enough to keep them from kinking under turning conditions? Could the fuel line (rubber hose) kink only when turning? Could a line be being pinched by the steering rack or the sway-bar as the car is turned? (I had one that had a fuel line pinched between the bottom of the tank and the top of the sway bar and drove me nuts for about a day while I searched for the problem......

I wish you the best of luck in finding your problem.

Johnman
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nebreitling
post Mar 20 2004, 03:00 PM
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FOUND IT!! (IMG:style_emoticons/default/smilie_pokal.gif)

f-ckedup connection to the #4 injector. did a quick fix, still need to pull the harness and give it a little, errr, 'refreshing'.

my car now goes like rush limbaugh in an oxycontin factory.

except it's a lot lighter, and turns sharper.

power oversteer!!! woo hooo!!! (IMG:style_emoticons/default/burnout.gif)
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Bruce Allert
post Mar 20 2004, 04:53 PM
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Good Job, (IMG:style_emoticons/default/beer.gif) Good sleuthing.... (IMG:style_emoticons/default/smash.gif) now go fix sumpin else! (IMG:style_emoticons/default/smilie_pokal.gif)

.........b
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