2.0l 8v dohc, lpg vialle mis-firing, Petrol ok, w reg

[halla]

Hi,
it seems to be mis-firing in lpg, but will do 60 - 70 mph in 3 gear.
I have changed lamda sensor much better petrol and
changed air filter much better petrol and
changed leads and plugs and had a
LPG vialle service, tank and pump
changed the CAT, it was empty.
Looking for PC diagnostics obd2, got need better and need to understand it!

LATEST UPDATE:
EGR valve soaked it in petrol, a little prodding and it seems ok, put back on. no vibration now. black sooty deposits

I keep pouring injection/carb cleaner down the throttle body, this seems to make the petrol much better. The lpg is better, but still sounds/feels like it's under water. How long does it take the cleaning fluid to burn through the engine?
Took it for a drive great on petrol, much better on lpg, will keep on cleaning the inlet manifold, and investigate further.

I do not want it to be the LPG injectors

[Frag]

Plug gaps are different for LPG than petrol alone...
Coil packs,leads & plugs are common,coilpacks have been changed on later models.
Is it factory fit lpg or aftermarket ?

[halla]

after market lpg system. vialle lpi, I have done about 150,000 miles no probs

I changed the plugs again to the ngk lpg ones gap as given, may try reducing them!.

I was hoping that it could be a sensor.

It's had 5 or 6 years of ford servicing. Only I found the air filter black and full of flys, dated 07/06.

I have been cleaning the throttle body. Black inky thick gunk. The cleaning spray flooded the body. When I started the engine I notice a little smoke coming up in the engine bay. Possible leak in the manifold or cat/exhaust. Could a small hole in this area give a misfire effect in lpg. Petrol keeps getting better. but still roughish. idles 850 - 900 rpm

I have an obd2 report basic. no error codes, no light on dash.
I need to compare my results against known values. What should I be seeing.
I also suspect the maf is dead i get a reading of 0.3 lb.

I'm in the Peterborough region, anyone got a 2.0l 8v dohc tranny. or the vialle software and plug.

Any help gratefully accepted


At least I am learning to look after my vinny.

[sportscott]

There is nothing that can go wrong with the Vialle LPI system other than the bearing going in the pump, that if it's an early model is welded into the tank, the newer models are bolted in, the vialle code reader and software is useless to you as it's a self learning system from the original ecu. If you are having problems with misfiring then it's usually an ignition problem but saying that mine had been playing up the last couple of months and when I was winterising it a month ago found out why, it only had about 2 litres of coolant in it can't believe I'd missed that, now back to almost daily checks.

[shuts1000]

Hi

I have 2002 tranny 2.3 with vialle lpi with a missfire,
have replaced coil packs, leads,plugs and reduced plug gaps and have just had multivave (pump in tank re conditioned)
yet i still have a missfire on lpg,van runs fine on petrol but i am running out of ideas for lpg now!
steve

[halla]

Hi guys/gals,
Petrol running ok(rough idle) but lpg seems like a misfire,(rough idle) and rough driving, is LPG on limp home mode?

Six mounths on,
Running with petrol treatment all the time. little better
I have fitted a new maff, no difference,£40 ,ebay
A new CAT, the old one was empty, £100
As I renew the petrol usually gets better! But I can feel that petrol is not 100%. top speed down from 115 to 100mph

I am getting a squeal from the EGR valve, From my readings, this can be a major cause of the gunk in the throttle housing.
Would it cause misfire rough driving especially in lpg.

I was doing 95 in petrol switched to lpg it slows down gradually to say 85mph. less evidence of rough handling,but lack of power torque
on the hills. nothing to different. (it has never been a smooth change over from petrol to lpg, switching)

I am thinking EGR and idle valve. Their is a small oil leak at the back of the engine top half.
I am losing coolant, oil cap looks clean. I had drained the radiator years ago, I over tightened the tap, I think it still leaks a job for the spring.

Trying to get readings from ECU, laptop is down. What I did get was a 18% long term trim value. What does this mean?
I will put my PC in the van and try to get values from new software today.

The vialle system piggybacks the ford ECU but takes reading from sensors that it needs. My thinking is that one or more of these sensors maybe down.

These are great vans, I would hate to lose her. Any suggestions welcome (sorry for my poor english, I'm a geordie!)

[Maltesefalcon]

In my opinion if you are loosing coolant you better check the sparkplug colour to determain if you have water in chamber and check if the hose pipes become stiff after a run.

[halla]

Maltesefalcon: I will keep an eye on this. Plugs are difficult to take out. The old ones were sooty. In the past the lidle valve was renewed due to soot and clogging.

The fault reader give a p0171 code lean condition. To much air in the system, 100% in gas. When the weather is better I will try to check for air leaks.

Radiator top up every week about 1.5 litres.

The egr valve whistling issue: (from my readings on the net)
This can bring up a p0171 fault code. It can leak unmetred air into the engine. I will look to do this job next.

Bank 3 trim results
--------------------------value---- units------min---avg----max
long term fuel trim -23 % -90 18 78
Short term fuel trim -32 % -96 -11 87

Any suggestions welcome

[Maltesefalcon]

you said that the plugs were sooty. Which colour brownish or blackish?

[halla]

Hi,
I would say the plugs were black. 2-3 years ago the idle valave was renewed black and cloged. I asked why when it ran on lpg, ford I do not know! The tail pipe is black and the oil gets black.

I previously cleaned the throttle body, (black thick oily) looks clean now. But I decided to try and clean again , aiming to get inside the inlet manafold. i poured a bottle of injector cleaner and a can of carb cleaner down the mother. Left it 10 mins and kept spraying in. I left the black tube off at the top of the EGR.

Result is: after a short run, that It runs 50% better in lpg not so rough running. Seems to be breathing better. petrol is more agressive, faster. May have fluid left in inlet. I have noticed a fast and rough idle in both systems.

This makes me think that the egr has been clogging up the inlet manifold. Do I keep on cleaning. Should/Can I do the EGR blanking in petrol/lpg. I can not find a mechanic willing to do any work "lpg scared".

Cleaned the inlet manifold again, carb cleaner left it for an hour. Petrol is smoother and better, LPG is nearly their. must be clogged the injectors.
****LATEST: Found a SPLIT rubber hose 5mm running off the egr metal pipes to the (DPFSE) box at the exhaust manifold area.
Simple to find if you become more familiar with your vechicles! Hope this is the worst, waiting for parts on the thermostat housing. Always check for leaks around the two temperature sensors in here!.
P.S this was mentioned on the forum, just did not sink in with me quick enough, thanks everyone
*****
Any advice welcome

[shuts1000]

Hello,

have same problem lpg running rough,have new coils ,plugs,leads ,vialle pump service,
read your post and tried pouring injector cleaner down air intake,a good few revs and plumes of smoke,
now runs better than its been in a long time on gas,still a slight hesitation,i am going to clean egr valve this weekend,hopefully i can get gas running perfect,how did you get on with yours?
cheers steve

[halla]

hi shuts1000,

Its easier to check the EGR broken pipe first. Above the exhaust manifold sits the EGR valve between these sits some small metal pipes, follow these untill you reach two rubber hoses (5mm). These go up to the silver box( forget name, DSPFE!) behind the radiator filler bottler. It's easy to remove the bottle out the way, 2 torx screws and the metal plate behind 1 torx screw. Just check these tubes for holes and the metal tubes, and any others. Mine was total split at the bottom. But never got a chance to start the van to see. Its got to be that allowing unmetered air into the system.

The LPG guy said that the gas is very dirty, and can block the injectors, I think the injectors have a filter attached I will soon find out. My EGR valve may have been stuck, but it was cleaner than I expected. I found a brass 15mm oval on the pipe. Try to do this after you have checked the pipes. You maybe able to stick a miiror under the EGR to see if the valve opens, with throttle. You should be able to suck on it and feel or hear it lift, try a straw. The EGR valve may not need opening. it felt a little delicate and could cost a few bob to fix.

I read something about a breather pipe which may be the cause of the contamination in the throttle body. It runs from the engine into the inlet manifold, with a valve which can stick. I need to do more reseach in this area.

As you know there's little room to move around the engine bay with all the gas pipes.. I also suspect the idle control valve of being bunged up. That needs cleaning.

The good news is that the Galaxy 2.0/2.3 may have the same sensors, scrap yards are full of them. Same coils Wish I had a product code sheet for Fords.

If you find anything let me know
all the best
Ian

[shuts1000]

Hiya mate gonna look at pipes today,

try this link ,it has some good info on vialle system including injector filters!

SuzukiTuning.com - Vialle LPi Technical Manual

[shuts1000]

If you have trouble with that link try this one,

http://www.suzukituning.com/General/Via ... oc26108878

cheers, shuts

[shuts1000]

If you have trouble with that link try this one,

http://www.suzukituning.com/General/Via ... oc26108878

cheers, shuts