LYNX Ghia 02 Choking or Nabubulunan

[SiC]

Newbie here..

Ask ko lng mga sir about sa ford lynx ghia 02 ko manual, kasi twice na nangyari sa akin na bigla syang nag-choke un nabibilaukan sya pag step mo sa gas pedal in first gear or in any gear (in sudden way). Tapos pag apak mo sa clucth ulit babalik sa normal idling, then pagka tinuloy mo un pag step mo sa gas in any gear para patakbuhin mag-chochoke nanaman sya hangang sa mamamatayan ka na. then pag ita-try mo i-start ayaw na. Then after mga 10mins-15mins lang try ko ulit i-start, un mag sstart na kagad sya in stable way.
Ano po kaya cause ng choking nya? nagpa-change na ako ng fuel filter, drain my gas tank, change spark plugs, cleaned my throttle body, MAF & AICV, change my air filter, check all my gas lines from tank to engine bay.
Ano pa po kaya nagtri-trigger sa choking or nabibilaukang situation then biglang mamamatayan if you continue to step on the gas pedal?

pina-diagnose ko na rin un whole car sa casa. wala naman problem un sa fuel pump sabi nila.

ano kaya problem dun mga sir?

thnx

[BlueBimmer]

leaking vacuum hose?

[SiC]

they've checked all the host and lines and no leaks at all..

[t2erns]

though they checked the fuel pump i'll think it' more likely the fuel pump or its circuit.

[orly_andico]

The "it dies and won't start until you wait a bit.." points to the MAF sensor. Which is a common failure item on certain Ford Lynx models. The later models allegedly have the problem fixed (new design MAF sensor) but I'm not sure if an '02 already has the fix.

niky would know.

But my money's on the MAF sensor. 3000 or so at Fordland etc in Banawe.

edit: oops I notice you've had something done to the MAF. Clean only, or replace? cleaning doesn't work out too great..

[niky]

I'm not sure... I don't know if it's the 02 or the 03 with the new part.

Indeed, it sounds like you've got a MAF or IACV issue. (Coilpack issues are kind of different)... but it could be any number of things.

Worst case scenario, if you've exhausted everything (sure there's no vacuum leaks?) is that you'll have to replace the computer box.

[orly_andico]

IACV issues would result in rough idling and engine shutoff when you release the clutch. They probably wouldn't cause the engine to not start for some time.

The "15 minutes of cooldown between starts" really looks like heat soak problems on the MAF.

The ECU issue is, I think.. a little extreme not to mention expensive.

[Hanren]

Newbie here..

Ask ko lng mga sir about sa ford lynx ghia 02 ko manual, kasi twice na nangyari sa akin na bigla syang nag-choke un nabibilaukan sya pag step mo sa gas pedal in first gear or in any gear (in sudden way). Tapos pag apak mo sa clucth ulit babalik sa normal idling, then pagka tinuloy mo un pag step mo sa gas in any gear para patakbuhin mag-chochoke nanaman sya hangang sa mamamatayan ka na. then pag ita-try mo i-start ayaw na. Then after mga 10mins-15mins lang try ko ulit i-start, un mag sstart na kagad sya in stable way.
Ano po kaya cause ng choking nya? nagpa-change na ako ng fuel filter, drain my gas tank, change spark plugs, cleaned my throttle body, MAF & AICV, change my air filter, check all my gas lines from tank to engine bay.
Ano pa po kaya nagtri-trigger sa choking or nabibilaukang situation then biglang mamamatayan if you continue to step on the gas pedal?

pina-diagnose ko na rin un whole car sa casa. wala naman problem un sa fuel pump sabi nila.

ano kaya problem dun mga sir?

thnx

baka yung fuel filter or clutch? I also have the same problem sa lynx ko. Pag nagchange na ako ng third or fourth gear at bigla ako aapak sa gas, na cho choke siya o naghe hesitate siya to the point na "mapapa subsub" na ako sa dashboard.. I have done all the necessary cleaning (throttle, MAF, etc) but I still have to observe. Di naman frequent yon but I think it still a cause for concern...

[hyperthread]

*sic: SpeedyFix is on Shaw Blvd and it's near Pure Gold and across Red Ribbon. Alam ko yata yan pwede kita samahan if you like. Pero before pumunta dun lets do a test drive on your car, di ba your mechanic have changed your Air filter? (The old one is kind of dukyot). Maybe your mechanic is right and this maybe one of the probable cause of your choking problem.

I think if the CPS / CMP sensor problem wwere being triggered during heat soak then it's hard for the OBD / ECU checkup to pinpoint if that sensor really is the cause of problem. Kailangan ma-recreate yung environment during check-up di ba? CMIIW.


*orly_andico: I believe it's fine to put a 93 Research Octane Rating on a 95 RON required engine. I am filling a 93 RON gasoline on my tank, no problems at all. In fact, when I tried filling it up with Shell V-Power (twice fulltank) pumangit ang takbo..

[SiC]

ok thnx hyperthread.

yup replaced my air filter with a new one. kasi un old air filter ko is talagang "dugyot" na parang binabad sa exaust pipe na mukhang greasy talaga. that's why my air filter can't get enough air going to the throttle body and to the engine as well & "maybe" creating some abnormal air mixture na rin..

and maybe my mechanic is right. but i still need to run it on some engine analyzer. to make sure na rin.

[hyperthread]

I also suggest doing the "Italian Tune Up" pero don't overdo it lang, works for me or maybe psychological lang.

Running on 140KPH-160KPH on NLEX for almost 5 minutes siguro..

Di lang kaya ng itlog ko and natakot ako baka mahuli at parang di na stable yung likod nung auto kaya tinigil ko na..

[Gasoline Boy]

We experienced the same problem with our Ford Lynx. It was a faulty mass air flow sensor. Quite expensive when you buy it from CASA. I would suggest if you have a friend who has a spare sensor, install it in your car and see if it removes the intermittent choking. This is a 5 minute job.

Our symptoms before was that the car would choke while we were at around 60 kphto 80 kph and during acceleration.

Good luck...

[SiC]

thnx peeps.

*gasoline boy: whhoooaaaahhh.. that small thing is indeed quite expensive.. Maybe thats going to be my last option to go through.. Hope not!
thnx for that.

btw, bought a new CPS and installed it.. I still need to observe it. Hope that this problem is over..

[hyperthread]

By the way, related itong thread na ito sa "Effect of Dirty Air Filter to MAF" thread ko, I just want to start a different topic about that.

Anyway, ganun pa din ang problem. After changing the CPS, Fuel Pump and MAF Sensor ganun pa din , itinirik pa rin..

Ignition coil? hmmm.. ipatanong ko kay sIC kung natignan na yun mekaniko. Malaki din ang possibility nito kasi after driving ng malayo at matagal saka sya tumitirik.

Sabi naman nung mekaniko ay computer box na ang problem.. may sunog daw at may watermarks (signs of moist or nabaha?)

The computer box sa Casa is worth 42,000.00... sa Fordland is 28,000.00.
Napakamahal.. tsk...

[niky]

Damn... so the worst case scenario did materialize, huh?

Was the car bought secondhand? Maybe the owner had an "incident" that he didn't tell you about...

If not, somebody borrowed the car and had that "incident"

[speedyfix]

yes we have a scanner in the shop.

[COMCAM]

check the hose connecting the brake drum ( Im not sure if this is the term ) that connects to your engine.