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MK4 2.0 DOHC - Fuel/ignition - problems

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MK4 2.0 DOHC - Fuel/ignition - problems

Postby Mr. Banas » Mon Nov 21, 2022 7:53 am

Hello
I need some help and advice.
Transit 97 2.0 DOHC. Last 6 years car was store in garage. When i bought him max speed was 60mph and have no power over 45 mph. I changed all fluids, oils, filters, radiator, spark plugs , brakes etc. Was much better 75 mph but stil weak. I know that is not race car but should be faster. I instal LPG instalation , car was driving good , after adjust LPG start litil bit jiggle with full trotle. Guys from LPG advice to change spark plugs from Denso to Champion and should be ok. And now start the story. I was na way back to Poland. On hils i used gasoline to prevent jiggle on LPG. 400 km from home on hill car lost power i drove on 3 gear 30mph on higway. On flat road was better but on hils now power. Starting perfekt 1,2,3,4 gear until 45 mph is good later is like someone trow big anker. Now is beter working on LPG than gasoline. Uff that was long story below my questions:
1. Ignition coils org num is 85WF-1229-BA i cant find with this num. on market are only 95WF-12029-BA - is next gen? Or i must have 85WF
2. I want check/change ignition coils, spark plugs , fuel pump
Have someone idea what i should check?
Aaa and car have 120,000 mi orginal
Sorry for my English.
Gr
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Re: MK4 2.0 DOHC - Fuel/ignition - problems

Postby MONSTER 0NE » Tue Nov 22, 2022 12:39 am

when i had my 2.0dohc on the road it easliy pushed 90mph, have you checked the coil packs ?
Right 5th Transit now A black petrol mk5 swb, soon to be coverted into a day van mpv.
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Re: MK4 2.0 DOHC - Fuel/ignition - problems

Postby MinorMatt » Tue Nov 22, 2022 4:26 pm

Im fairly sure the NOS coil pack I have in stock is a 95WF part number - its entirely possible a previous owner has fitted the wrong type (or Ford may have fitted a different type for use with LPG, but it seems unlikely...)

It appears there may be 2 options... an ignition pack on spark plug type (never seem one on a transit, but you never know) and a type with 2 HT leads. The 2 HT type is 95WF-12029-BA
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Re: MK4 2.0 DOHC - Fuel/ignition - problems

Postby Mr. Banas » Thu Nov 24, 2022 9:56 am

MONSTER 0NE wrote:when i had my 2.0dohc on the road it easliy pushed 90mph, have you checked the coil packs ?


My Transit drive max 70, down hill maybe 80. I have i my car coils 85WF-12029-BA this is part from Granada, Galaxy. I ordered new coils wit correct number
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Re: MK4 2.0 DOHC - Fuel/ignition - problems

Postby Mr. Banas » Thu Nov 24, 2022 9:58 am

MinorMatt wrote:Im fairly sure the NOS coil pack I have in stock is a 95WF part number - its entirely possible a previous owner has fitted the wrong type (or Ford may have fitted a different type for use with LPG, but it seems unlikely...)

It appears there may be 2 options... an ignition pack on spark plug type (never seem one on a transit, but you never know) and a type with 2 HT leads. The 2 HT type is 95WF-12029-BA


I have in my car 85WF- is Granada, Galaxy, why i have no idea. I ordered new cables and orginal coils.
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Re: MK4 2.0 DOHC - Fuel/ignition - problems

Postby madmart132 » Mon Nov 28, 2022 3:50 am

I am not 100% sure but I think that your van has an OBD2 port ?
It maybe better to get your codes read , I doubt that there is a problem with the coils, it would misfire on gas if there was .
Depending on gearing they are limited to 175kmh (108mph )top speed so you are way off power . Problems I have had with the Mk5 petrols are
1) air leaks in the inlet manifold and plenum box , that's the big plastic box over the engine
2) lambda sensor gone and restricted performance
3) the Mk5 transit has an ignition amplifier ( which sounds like your problem ) on rhd models it is close to the exhaust system on right hand side of the engine bay
What is your fuel consumption heavy or ok ? If you are traveling at 110kph you should use around 10 litres of petrol every 100kms
Please let us know how you get on
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Re: MK4 2.0 DOHC - Fuel/ignition - problems

Postby Mr. Banas » Mon Nov 28, 2022 7:54 pm

madmart132 wrote:I am not 100% sure but I think that your van has an OBD2 port ?
It maybe better to get your codes read , I doubt that there is a problem with the coils, it would misfire on gas if there was .
Depending on gearing they are limited to 175kmh (108mph )top speed so you are way off power . Problems I have had with the Mk5 petrols are
1) air leaks in the inlet manifold and plenum box , that's the big plastic box over the engine
2) lambda sensor gone and restricted performance
3) the Mk5 transit has an ignition amplifier ( which sounds like your problem ) on rhd models it is close to the exhaust system on right hand side of the engine bay
What is your fuel consumption heavy or ok ? If you are traveling at 110kph you should use around 10 litres of petrol every 100kms
Please let us know how you get on


Hello
For 100% my coils are from Granada - i ordered new one + new cables. Should be in Poland end of next week. (only motrkraft and only Germany)
1.OBD is in fuse box - but you see only what car it is, no trouble codes etc.
2. Engine misfire on petrol and gas
3.All air leaks chcecked , he have fresh LPG instalation
4.Petrol +/- 12 LPG 13/14 and not possible more:D and is 150L and H2
5. I read about ignition amplifier but i cant find in my car.
I will inform :D
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Re: MK4 2.0 DOHC - Fuel/ignition - problems

Postby madmart132 » Tue Nov 29, 2022 11:22 am

Well I guess you will have to fit the new coils and plug leads first to eliminate them.
Can you send a photo of the bottom of the engine bay , drivers side and passenger side please? This will help me show you the ignition amplifier
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Re: MK4 2.0 DOHC - Fuel/ignition - problems

Postby madmart132 » Tue Nov 29, 2022 11:36 am

I have actually remembered another potential problem , I sold my last smiley face transit petrol in 2013 so sometimes I forget little problems that can happen .
Another Polish guy had a Mk5 petrol LPG with similar problems and it turned out to be the ECU temperature sensor in the inlet manifold !!
It was faulty and telling the ECU to put more fuel in , but this is also what happens when the lambda sensor goes wrong as well
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Re: MK4 2.0 DOHC - Fuel/ignition - problems

Postby madmart132 » Tue Nov 29, 2022 11:47 am

The other Polish guy is Sportscott maybe find his post's and send a private message in Polish as we lose a lot in translation
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Re: MK4 2.0 DOHC - Fuel/ignition - problems

Postby Mr. Banas » Tue Nov 29, 2022 8:08 pm

madmart132 wrote:Well I guess you will have to fit the new coils and plug leads first to eliminate them.
Can you send a photo of the bottom of the engine bay , drivers side and passenger side please? This will help me show you the ignition amplifier


I will make pic's for you. Will be new coils , cables and spark plugs change week ago -> no change. I have wrong coils not for this engine 99,9% that is coils problem.
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Re: MK4 2.0 DOHC - Fuel/ignition - problems

Postby madmart132 » Wed Nov 30, 2022 6:24 pm

Ok well we will see , I would still contact Sportscott as he is also polish and has basically the same van as you
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Re: MK4 2.0 DOHC - Fuel/ignition - problems

Postby Mr. Banas » Wed Nov 30, 2022 7:56 pm

madmart132 wrote:Well I guess you will have to fit the new coils and plug leads first to eliminate them.
Can you send a photo of the bottom of the engine bay , drivers side and passenger side please? This will help me show you the ignition amplifier


I think is this. 91AB-12K072-AA
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Re: MK4 2.0 DOHC - Fuel/ignition - problems

Postby madmart132 » Thu Dec 01, 2022 9:51 pm

Yes that is the ignition amplifier, it boosts the power to the coils I believe, I also think that maybe your problem rather than the coils themselves
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Re: MK4 2.0 DOHC - Fuel/ignition - problems

Postby Mr. Banas » Fri Dec 02, 2022 1:35 pm

Power is back :)) New coils, new cables and changed ignition amplifer. Now is drive easy 90 mp/h.

Thanks for help.
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