Question about 1995 Geo Prizm

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Codes reading 31 what is this, 95 geo lsi with 1.8 engine

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A MAP sensor problem will cause the symptoms you are experiencing. The MAP sensor is critical because you have a speed density type fuel injection system. Without the MAP sensor signal or an inaccurate one, the ECM won't know the engine load for ignition timing and fuel injection adjustments. The engine computer is detecting a high voltage condition on the MAP sensor signal circuit.
Inspect the vacuum hose going to the MAP sensor. Replace it if is looks cracked or if it collapses on itself. Make sure that the MAP sensor has vacuum by disconnecting the hose from the sensor when the engine is running and feeling for vacuum.

If you have vacuum, you can check the MAP sensor and its circuits with a multimeter. There are three wires going to the sensor. I am not sure on the colors, but Yellow should have 5 V on it with the key on. Brown is ground and should read close to 0 ohms. Light Green with a Red stripe should have 5V on it with the key on. If you backprobe the MAP sensor connector with it plugged into the MAP sensor on the light green/red wire and apply vacuum to the sensor, the voltage should drop.

Posted on Jul 20, 2009

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Posted on Jan 02, 2017

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Egr not working 97 geo metro lsi


H3LL most of those old 90s car it does not work now.
(ive cured many) (some take 5hours hard labor De-carbonizing the thing)

how do you know that,?
guess:
1 P0400 DTC errors?
2 pinging?
3 fails smog?,,.
is it too hard to tell the story>?

This is Suzuki swift if you had not notices
open hood lookup see that sticker, says SUZUKI
clear as day, and means parts more easy to find.
In the USA we got G engines. G10,G13 top sizes
all suzuki's this era
have horrible Rube Goldberg EGR
vacuum and cat backpressure, magic,err horrors
test 1.
find the EGR main,
see rear and the skeleton-ized frame?
hot engine, we use vacuum tool on its nipplefitting
and it stalls the engine or near, 800 goes to 400. rpm.
that means the 5hour labor part is ok.
leaving vacuum parts or electric VSV

if the diaphram fails to move the valve is bad.
if it moves fully (1/4" or more ok.
so remove it, and clean the carbon seen here.
valve ports. put back pass stall test now?
if hot the hidden exhaust path is blocked.

end, im not doing the vacuum/elect, cat pressure side now.. until you report stall test results.
this test here 1 test cuts the job in half.

Feb 12, 2017 | Geo Cars & Trucks

1 Answer

Does a 1993 geo prizm 1.8L lsi have two temp sensors?


buy the manual. and RTM,
and yes, Air , water, and on a stock car up to 3 coolant sensors.
The ECT runs the ECU. tells ECU coolant temp.
my guess is the coolant gage is dead? RTM
on most 93 car, the Guage has its own sensor, (isolated)

89-02
joint venture, GM/toyota with 3 engine used.
1.8L or 1.6L
toy engine, 4aFE, 7AFE or 4AG
open hood look
or use the GM RPO tag
or Use the VIN to find motor used.
for docs?
ebay
search
Geo Prizm factory service manual, Duh?

http://www.ebay.com/sch/i.html;jsessionid=D19D723C2EDB4A9FE12E7C01C0677129?_sacat=0&_nkw=geo+prizm+shop+manual&_nkwusc=geo+prizm+shop+manaul&_rdc=1

Feb 18, 2013 | Geo Prizm Cars & Trucks

1 Answer

1993 geo prism lsi 1.8 engine brake lights stay on all the time what could cause this


soiunds like your brake light switch is stuck in the on position. look under the dash above the brake pedal.

Jun 02, 2011 | Geo Prizm Cars & Trucks

1 Answer

Is it normal for a 96 geo lsi when its at 60 for the rpm to be at 3.5?


It's perfectly normal, the engine you got in that car is very small and it means you have less gear ratios, once on the top gear the car will speed up by staying on that gear and rev'ing up the engine.

Feb 09, 2010 | 1996 Geo Metro

1 Answer

1994 Geo Prizm LSI running one day won't crank next day


turns over and crank are the same thing,
so you are saying it does crank over but no start,right?
you need to determine if you have at least 50psi of fuel pressure in fuel rail at reed valve.

Dec 22, 2009 | 1994 Geo Prizm

2 Answers

Cannot pass inspection. emissions.


go to a place like autozone or pepboy autoparts
tey will the code retriver myth have a factory code
that service is free,if they are code they will explane
wath next

Apr 19, 2009 | Geo Prizm Cars & Trucks

1 Answer

1993 Geo Prizm Lsi Harmonic Balancer


Yes a harmanic balancer from tha corolla is the same thing. I had to do the same thing with my 95 geo. It works out to be a lot cheaper buying for a toyota than a geo.

Jan 11, 2009 | 1995 Geo Prizm

1 Answer

Where to fill gear oil in manual 5 speed 1990 geo lsi


It should be the same place as a 1991 Metro, on the back side of the transaxle there is a plug that takes a 15/16 wrench to remove. the plug faces the drivers side tire. If oil drips out when you remove the plug it is full. Otherwise use your finger to see if you can touch the oil. Fill with some type of syringe. jeb

Dec 29, 2008 | 1991 Geo Metro

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