[Need Help] Ford Lynx - Engine misfires and stalls at Idle when engine is warm (worst if with A/C)

[Jeh]

can you identify your engine? was the car manufactured in the u.s. or europe?

The engine is similar to the engines of mazda 323 if i am not mistaken. Actually, parehong pareho sya sa mazda familia or protege yata. ZM-DE engine for the 1.6 variant.

This car was released 1999-2000.


Sent from my iPhone using Tapatalk

[Jeh]

Sa lynx ng pinsan ko, turns out it was just faulty high tension wires.

Replaced the high tension wires no more, problem.

Sent from my ASUS_Z00AD using Tapatalk

Same din sir ng symptoms? I may have overlooked yung coils kung yun nga ang sira. All along I was focusing sa intake area kasi ang suspect ko is lack of air kasi at idle lang namamatay. Will try to inspect/replace coils. Ang mahal kasi nito for OEM, 4k x2, so 8k yata.


Sent from my iPhone using Tapatalk

[innova2013]

mga possible na sira bro.

-ignition coil
-ECU (leaking capacitors kasi luma na)
-MAF sensor (kung mali reading nito lalo na kapag mainit na makina o mainit ang outside temperature, erratic ang idling)
-oxygen sensor

kung OBD1 ka, may kailangan kang ishort sa diagnostic box or sa ECU habang naka ON position yung ignition key (hindi naka start makina), tapos mag blink si CEL ng error codes mo. baka meron sa internet kung paano gawin.

[Jeh]

mga possible na sira bro.

-ignition coil
-ECU (leaking capacitors kasi luma na)
-MAF sensor (kung mali reading nito lalo na kapag mainit na makina o mainit ang outside temperature, erratic ang idling)
-oxygen sensor

kung OBD1 ka, may kailangan kang ishort sa diagnostic box or sa ECU habang naka ON position yung ignition key (hindi naka start makina), tapos mag blink si CEL ng error codes mo. baka meron sa internet kung paano gawin.

Thank you sa input sir.

- ignition coil -will check this tomorrow
-ECU-leaking capacitors-can this be fixed??? O palit ECU. Ang alam ko ginto to hehe.
-MAF sensor-negative sir, hindi po erratic idling ng lynx ko. Even when hot, nagddrop lang when ngmisfire pero 1 in 20 seconds siguro. Di yung maalon na idle
-O2 sensor- triny ko na hanapin sir pero parang walang sensor na nakakabit sa exhaust from headers to muffler. If i am not mistaken, yung 2.0 variant lang may o2 sensor.
-OBD1 - ito po talaga need ko kaso wala na ako mahanap na shop na may obd1 scanner. Puro OBD2 po. Also, walang CEL (i mean walang ganun sa instrument panel) ung car kaya obd talaga need ko to check if may trouble codes.


Sent from my iPhone using Tapatalk

[innova2013]

Thank you sa input sir.

- ignition coil -will check this tomorrow
-ECU-leaking capacitors-can this be fixed??? O palit ECU. Ang alam ko ginto to hehe.
-MAF sensor-negative sir, hindi po erratic idling ng lynx ko. Even when hot, nagddrop lang when ngmisfire pero 1 in 20 seconds siguro. Di yung maalon na idle
-O2 sensor- triny ko na hanapin sir pero parang walang sensor na nakakabit sa exhaust from headers to muffler. If i am not mistaken, yung 2.0 variant lang may o2 sensor.
-OBD1 - ito po talaga need ko kaso wala na ako mahanap na shop na may obd1 scanner. Puro OBD2 po. Also, walang CEL (i mean walang ganun sa instrument panel) ung car kaya obd talaga need ko to check if may trouble codes.


Sent from my iPhone using Tapatalk

Narerepair ang ECU. depende sa sira. kung leaking capacitors lang, kayang kaya ng mga eletrical shop yan. hanap ka na lang ng mga shop na may ECU repair service.

try mo tignan o inquire sa mga bosch centers, baka may OBD1 scanner pa sila.

[jaypee10]

wag sana COMP BOX
pero pa check mo na din.or pwede mo din buksan baka may mga leak cap (LOBO)or may sunog na resistor.na rerepair naman yang mga yan.wag lang talaga spider type IC.kung transistor regulator lang. may nabibilan..

[Jeh]

wag sana COMP BOX
pero pa check mo na din.or pwede mo din buksan baka may mga leak cap (LOBO)or may sunog na resistor.na rerepair naman yang mga yan.wag lang talaga spider type IC.kung transistor regulator lang. may nabibilan..

If transistor culprit sir magpapakita ba yan sa trouble codes or visual inspection will do? Thank you


Sent from my iPhone using Tapatalk

[t2erns]

check mo uli cam sensor, gamitan mo ng blower para simulate mo init. since MAF ang system check mo na din kung walang pumapasok na air na hindi nasusukat ng maf like yung mga vac hoses.

[oj88]

Just throwing this out...

I think the clue here is that, the engine appears to run better when cold than when hot.

Simply put, when the engine is cold, the ECM goes into open loop. It means that it will ignore the O2 sensor and use the preset air-fuel table stored in the ECM program. This program is usually biased towards a 'rich' A/F mixture. Once the engine warms up (as dictated by the coolant temp sensor), it goes into closed loop and air-fuel mixture is computed based on the measurements provided by the different onboard sensors, including the O2 sensor.

If the O2 sensor is faulty and isn't providing the correct output, it will usually cause a CEL. However, it may be possible that the ECM is still seeing the sensor to be within the acceptable parameters based on its programming, but in reality, is already giving out erroneous signals.

[Jeh]

check mo uli cam sensor, gamitan mo ng blower para simulate mo init. since MAF ang system check mo na din kung walang pumapasok na air na hindi nasusukat ng maf like yung mga vac hoses.

Thank you sir. Pero diba dapat ang cam sensor, if mainit na, hindi aandar not until lumamig ulit yung sensor? Ganun kasi symptoms ng ibang lynx per reading sa ford club. Umaandar po kasi agad eh. Or can it be failing na rin sya?

Sige sir test din namin kung may vacuum leak.


Sent from my iPhone using Tapatalk