Question about 1997 Geo Metro

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Bad body throttle

What makes it stall out an not run

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  • Geo Master
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Old posts .
if it cranks all engine stall for the following reason.
(physics) in the proper order.
1: engine bad. (or cant breath) (compression loss huge 1 or more cylinders.
2: this engine 1.0L or 1.3 runs on GAS, and spark is next , no spark running end. (slow or fast, and is called misfiring)
3: bad fuel, (too much flooding its called or too little bogging and stalls)

1,2,3, its one of those 3 things
there 3 exceptions (kinda)
a: battery power ended, 12v became 8v and engine stalls, actually EFI goes (OFFLINE) when no power. to run it.
b: EGR stuck open. very common, make all the above useless when stuck open.

c: idle air, the engine need air to breath or it floods.
there are 2 parts related to this fact, IAC valves if many times. or ISC valves, that meter air hot or cold engine.
(thermal air valve or electric or both)
if they stick closed, no air now , engine stalls , unless you right hot foot the throttle pedal and save the stall., if that is super easy , you lost air !

the number 1 reason for stalls in not getting tuneup.
Are your spark plugs in car , antique?
going for the 10 year record on spark plugs, or spark wires.
why?
then FILTERs.
to solve this riddle, the shop uses TOOLS, those tools.
Gauges , meters, scanners and scopes.
Make the job easy and fast.
why not ask a shop just to diagnose car. (be wise to tune up first and not have them prove to you with hours of labor proving, gee,
all these parts here, are useless. (aka. basic service points parts)

Posted on Oct 23, 2016

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Posted on Jan 02, 2017

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The idle air control is mounted on the passenger side of the intake,at the very end of the intake. make sure the engine isn't hot when you remove it because two of the rubber hoses have coolant from the engine in them and if it is hot it could spray you. I sprayed CRC throttle body cleaner on mine and it cleaned it up pretty good. also be careful not to turn the adjusting screw on it as you could make your idle worse.

You can check the EGR to find out if it is bad or plugged,with the engine idling reach under the body of the EGR valve and push up.if it is working the engine should try to die when you do this. I would also check to make sure there are no cracked or broken vacuum lines.no cracks or leaks in the snorkel going to the throttle body and with the engine running tap on the top of the maf sensor with your knuckles,if the idle changes than your maf sensor is probably bad. you can unplug the wires from the maf sensor with the engine running and if the idle doesn't change then its bad. These engines are temperamental,for instance they have to maintain vacuum in the engine to run properly_something as minor as the seal on the oil cap allowing air into the valve cover will make it run poorly. Have you checked for any codes or is the check engine light coming on?

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