1993 Toyota Corolla hydrocarbon (hc)

COSTASS

MEMBER
1993 TOYOTA COROLLA
4 CYL
FWD
MANUAL
180,230 MILES

Hi. My car(corolla 1332cc 16valve) have hydrocarbon (180ppm) only in idling. The other aerial is o.K. Where is the problem?
Thank you.

Thursday, September 30th, 2010 AT 11:30 AM

4 Replies

RASMATAZ

MECHANIC
75,992 POSTS

Could be the plugs, wires, coil, vacuum leaks, fuel pressure problem, injector and engine compression

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Thursday, September 30th, 2010 AT 11:38 AM

COSTASS

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6 POSTS

I have change plugs, wires, distributor cup, rotor, fuel pressure regulator, oxygen sensor, injector, 0 ring of injector and cooland temperature sensor. Check the ignition coil resistance, the air intake temperature sensor, map sensor, throttle position sensor vacuum hoses for vacuum leaks and are okay. Except the hydrocarbons no other problem has been the engine. Start without problem and has good acceleration.

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Thursday, September 30th, 2010 AT 12:27 PM

RASMATAZ

MECHANIC
75,992 POSTS

The main thing here could be an ignition misfire, lean fuel condition and engine compression-How's the engine compression

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Thursday, September 30th, 2010 AT 3:48 PM

COSTASS

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6 POSTS

I have not even measuring compression. Evidence from gas analyzer
800 rpm
co% 0.05
co2% 15.79
hc(ppm) 187
02% 0.5
lambda 0.991

2600rpm
co% 0.01
co2% 15.85
hc(ppm) 16
02% 0.03
lambda 1.000

Do not know if I can understand something from the analysis of exhaust is causing the problem.

Thank you for your time.

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Friday, October 1st, 2010 AT 10:31 AM