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.

[niky]

Ah, if it's "15 minutes of cool-down", it could also be a cam-position sensor problem.

Check on the fordclubph.com forums... another member had trouble diagnosing his problems and bought absolutely everything before fixing it. He has extra sensors and coilpacks (hardly used) for sale.

[orly_andico]

Hehe it's all over the map!

Does the '02 Lynx use coil-on-plug? or simply distributorless ignition?

On the 626 the "15 minute problem" was usually traceable to the ignitor transistor going flaky due to heat soak.

[niky]

Distributorless, I think. One of the first in the Philippines.

[SiC]

Thanx for all the replies.

last 2 weeks ko lang napa-diagnose sa casa un auto. They told me na ok naman un MAF, IACV & Throttle body so kaya cleaning lang talaga recommended. kasi before is meron syang a bit unstable idling, but after kong mag pa-cleaning ng MAF and un IACV kasama na rin un sa throttle body is naayos naman un idling nya. so untill now is stable and healthy naman ang idling nya.

ang di ko lang talaga malaman is what's causing that choking problem and if kung kailan ulit magti-trigger un choking problem nya na unpredictable. kasi malalaman mo na lng habang tumatakbo un kotse then biglang mag cho-choke na lang kagad. un nga lang di sya madalas mangyari. so far 1st time it happened is last month then 2nd this month lang.

Hope it has nothing to do with the computer box or (ECU).

[Josh0027]

did you have your timing changed or yuor a/f tinkered with? it might be the cause, my hunch only.

[niky]

Try checking the Cam Position Sensor. CMP (although how you get CMP from what should be CPS, I don't know... ). If the problem doesn't happen very often, it might just be that.

What were the common conditions between the two occurences? Was it during the middle of the day? Was it hot out?

High temperatures inside the engine bay, exacerbated by heat soak due to traffic and hot conditions outside, often lead to cam position sensor and ignition coil problems.

The car will still run (but very roughly) if one of the ignition coils gives way. If it's the CMP, the car will just up and die, then restart once it's cooled down... just as you describe.

[SiC]

Cam-Position Senor? san ko po ba makikita un cam position-sensor? kailangan ko bang i-replace or cleaning lang un? saka nasa magkano kaya un price ng original part if replacement is advise?

thanx,

[speedyfix]

the problems like that i've seen have been fixed by replacing the ignition system...

[orly_andico]

*SiC,

the cam position sensor is, I believe, on the transmission bell housing. It's a small bolt-like device. Call Fordland or Autorama in Banawe, they do sell the CMP for the Ford Lynx. a couple thousand if I recall correctly. It's not clean-able; it is a magnetic pickup device and is purely electronic, no moving parts.

You know what you should do.. instead of doing what niky's forum buddy did and replace everything.. go to the casa and have them download the ECU error codes. Or go someplace like Zee in Aurora Blvd, they also have the OBD-II scanner (I think Migs/Speedyfix has it too). Para at least you have an idea of what the engine computer thinks is going wrong.

[SiC]

thanx guys for all the response.

ok then i'll have it sched for some ECU check-up..
hope they can scan the error pertaining to that choking situation..
it first occured last month at night time (8pm) not too hot outside. and the second one at (5pm) sundown just this month lang.

I remember, last time kc nung first encounter ko is medyo low na un gas ko. So naka light un warning light ko sa fuel gauge that i realy have a low fuel. so nag pa-gas ako ng 1k. then in a matter of 20mins nag choke na sya.
Un sa 2nd choke nya naman is meron pa naman laman na mga half un tank ko and nag pa-gas ako ng P500 morning, then mga afternoon sya biglang nangyari ulit (unleaded lang pinakakarga ko from shell).
does this have to do with the choking problem? or sa gas?

thnx..

[SiC]

sir speedyfix. do you have an OBD-II? or a computer to diagnose an ECU in ur shop?
saka pano po papunta jan? saka pwede na rin po pa pm if magkano..
thnx

[orly_andico]

hind ba dapat 95 RON ang lynx engine?

[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...