Question about 1995 Geo Metro

1 Answer

Motor runs at 4000 rmp when started

Replaced tps part..same prob...choke assy is open alittle bit also...should be closed?

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  • Dean Brandl
    Dean Brandl Jan 30, 2014

    1.3 liter,USA didnt know the tps had to be calibrated,how is that done? diagnostic code showed tps problem only.Replaced the part..still does the same,starts fine,but goes to 4ooo right away.Choke is open also about 1/8 inch..i tried to manually close wont close any futher.

  • Dean Brandl
    Dean Brandl Jan 30, 2014

    havent had new part checked yet tp see if its bad.

  • Dean Brandl
    Dean Brandl Jan 30, 2014

    regristration says 96yr. has throttle body assy.

  • _-__-___-_
    _-__-___-_ Jan 31, 2014

    what country, what VIN? the VIN tells me engine, and year. Diagnosis depends on that. I cant see under hood so.....????? here is an example. JG1MR3369TK201234 (the T means 1996) THE DOOR JAM DATE IS BUILD DAte, which could be July1, 1995 and means nada. the 8th digit is the ENGINE code.. 3-cyl = 6, 4-cyl (1.3) = 9.. i think the code 9 engine began , in 1998. if your car IS a VIN coded 1996 and is in the USA< It will be OBD2 compliant AND as such,any scan tool will scan this Engines PCM/ECU. is it USA car? sold there?

  • _-__-___-_
    _-__-___-_ Jan 31, 2014

    Does the CEL lamp glow key on. Y/n

  • _-__-___-_
    _-__-___-_ Jan 31, 2014

    Does it go out , running engine (dash warning lamp CEL):?

  • _-__-___-_
    _-__-___-_ Jan 31, 2014

    does the idle race Hot and cold engine, (or both ) at 4000 RPM?

  • _-__-___-_
    _-__-___-_ Jan 31, 2014

    You 3cyl , engine IS , TBI engine, throttle body engine ,with a MAP sensor that runs the show. and all these engine RACE at idle if there are any vacuum air leaks, finding where the leak comes from takes very hard work. a simple hose cracked to bad IAC. or throttle body leak.

  • _-__-___-_
    _-__-___-_ Jan 31, 2014

    did you calibrate the TPS, if not , it can race. The TPS tells the ECU when you are at idle if not, the ECU cancels idle controls.



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  • Geo Master
  • 20,706 Answers

1995 Geo Metro. COLD start or HOT started or BOTH?
Does it ever idle down to 800 HOT? (engine temp)>?

Geo Metro (later re-branded the Chevrolet Metro), Pontiac Firefly, and Suzuki Swift
which engine, what country???
I will post for USA only !!!!
Auto or stick tranny???
the USA 1995 was the last car to use TBI injection (throttle body)
the LSI option, then had a 4 cylinder. in 1.3Liters.
and works totally differ. than any 1.0L
answsering for 1.0L

Have you inserted the Diagnostic jumper wire and looked at the
FLASH codes yet?
choke? on 95? what country is this, ours are not carbs. in 1995.
so post country. ours are all EFI in USA.
3 cylinder? 1 liter? or which engine/?
on any USA Metro, 1L , when first started, it has 2 valves. to control IDLE, (cold , is iAC) hot is ISC, The cold start valve opens farther the colder it is (how cold was it). but usually is limited to about 2000 rpm
this engine, TBI, uses a MAP to control fuel mixtures, and
any air leaks (aka; vacuum leaks) what so ever, will cause too fast idle.
so on MAP cars, you get to find out what is leaking AIR.
1995 has the new better , idle control speed motor, (ISC)
this can be stuck open.
that new TPS, did you do the calibration correctly?
it must set right. or idle will never be controlled.
finding the cause, takes hard work, and hands on testing
A/C fast idle broken
A/T transmission fast idle, device, broken.
Air leaks (add huge list of possibles and cracked hoses here)
Throttle stuck
ISC or IAC bad.
very hands on to find this, done many.
TPS on indexed corrrectly or not calibrated.

Posted on Jan 29, 2014


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