Question about 1991 Geo Tracker

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1991 Geo Tracker only starts with starting fluid.

I have a 1991 geo tracker that won't start unless you spray starting fluid down the air cleaner. Once it starts you can shut it back off and try to start it within just a couple of seconds and it just turns over. It will only start back up if you spray starting fluid down the air cleaner again. Also when it does finally start if you mat the throttle it falls on its face for a second then picks up. It has plenty of power it just has problems starting. Any ideas? Thanks! My tracker has similar problem> It only starts with starter fluid but will not continue running on gas unless I place my hand over the air intake. I have already replaced the fuel injector which obviously needed to be done.

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Bad response, 91 has no maf. and two cars one post WOW !
but the fuel starvation my be wrong too.

when you use starting fluid this fluid is hot.
and WILL start a flooded motor.
so tune it up and then
HOLD throttle WOT , this shuts down injection and if car starts it WAS flooded.

this 8v TBI can have bad injector seals and can dribble and cause constant flooding. easy test ,just look and key on 10times
no dribbling allowed.
under pressure the system must NOT dribble.

if on the other hand , it is starvation.
then
check fuel pressure.
at the fuel filter test port on the side of the banjo.

http://www.kick-fix.com/
its all here.

Posted on Oct 22, 2009

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Check fuel filter on both vehicles...After that check fuel pressure ...Blocking off air flow to engine will change the fuel air mixture...air deprivation changes (lessens) air flow and fools engine into reading more fuel than is actually there. Mass air flow sensor should also be checked/cleaned if no results obtained by filter change if pressure is OK.

Posted on May 29, 2009

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I have 1995 geo tracker. cranks over but doesnt start. would it be coil or fuel problem?


You need to conduct tests to be sure where the trouble is.
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1991 Geo Tracker only starts with starting fluid.


91 is 8valve TBI injection.
it is flooding.
the starting fluid is more combustible and starts a flooded motor.
kinda like adding dynamite to bbq lighter fluid.
hahah
ok,
try a tune up.
then try holding gas pedal to floor, this is super secret unflood mode and cuts fuel injection.

the issues why its flooding, not starting is normal for that condition.
so its:
1: bad need of tune up
and or
2: leaking injector.

the former you can figure out.
cap/wires/plugs /rotor, filters, there i said it.

or
this car has a viewable fuel injector
one an do 2 things with it.
key on five times , or 5 seconds on, not cranking
and other person looks down throttle body neck
yes, off comes the tube on top.
and makes sure the injectors dont dribble full time, key on.

or
the ECT is bad.

or dash pot is not opening at key on crank.

or
cold start, IAC is clogged.

complex it is,
it will take hard work to check everything.

http://carfix.stufftoread.com/
see flooding here.


Mar 26, 2009 | 1991 Geo Tracker

2 Answers

1993 geo tracker engine idels high all the time


you need to post
8vlave
or 16valve motor

they can be either.

but there are 50 things that can kill idle.
air leaks
ISC valve stuck
ignition timing too far advanced a idle.
and many more
tell more , get more.

Feb 18, 2009 | 1993 Geo Tracker

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