Search found 25 matches

by gazwad
Thu Jun 13, 2019 9:36 am
Forum: Having Problems ?
Topic: part throttle hesitation
Replies: 35
Views: 1538

Re: part throttle hesitation

how does this map look now? I've upped the pressure to just under 1.4 bar:
Imagelpgc1 by garrywadey, on Flickr
by gazwad
Tue Jun 11, 2019 1:18 pm
Forum: Having Problems ?
Topic: part throttle hesitation
Replies: 35
Views: 1538

Re: part throttle hesitation

thanks, i will give that a try. I have since advanced the ignition timing slighly (easy to do on the honda b series engine) as i believe the lpg likes a bit more advance in the low to mid range and it's not the sort of car that gets revved up much. Seems to have improved the mid range slightly and m...
by gazwad
Sat Jun 08, 2019 6:06 pm
Forum: Having Problems ?
Topic: part throttle hesitation
Replies: 35
Views: 1538

Re: part throttle hesitation

I've not replied for a little while as i wanted to do a couple more fill-ups to get a more accurate idea of mpg. It is still on the low side (20-23mpg on a run against 28-30 on petrol). I have changed the lambda sensor and given it a good service but no noticeable change. pressure is set to 1.2bar, ...
by gazwad
Tue May 14, 2019 12:53 pm
Forum: Having Problems ?
Topic: Slight gas smell - normal?
Replies: 5
Views: 266

Re: Slight gas smell - normal?

Checked on the software and the gas pressure remains constant after it is switch over to petrol so I don't think thee is a leak on that side of the system
by gazwad
Mon May 13, 2019 7:55 pm
Forum: Having Problems ?
Topic: Slight gas smell - normal?
Replies: 5
Views: 266

Re: Slight gas smell - normal?

Already checked the vacuum line and no leak there, also checked the diaphragm which is fine. Injectors could be a possibility then, would that also possibly explain why the fuel consumption on lpg is higher than expected?
by gazwad
Mon May 13, 2019 5:10 pm
Forum: Having Problems ?
Topic: Slight gas smell - normal?
Replies: 5
Views: 266

Slight gas smell - normal?

On my Honda stepwagon when it's been running on lpg then turned off I can sometimes smell a slight whiff of gas at the front of the car. I can't find any leaks (using leak detection spray). Could this just be a bit of gas left in the inlet manifold making its was back out through the air filter?
by gazwad
Sat Apr 13, 2019 11:21 am
Forum: Having Problems ?
Topic: part throttle hesitation
Replies: 35
Views: 1538

Re: part throttle hesitation

I've dropped the pressure to 1.2 bar, hopefully that will be OK and not too weak
by gazwad
Thu Apr 11, 2019 10:49 pm
Forum: Having Problems ?
Topic: part throttle hesitation
Replies: 35
Views: 1538

Re: part throttle hesitation

OK so it's been running perfectly on lpg but I'm still only getting around 20mpg on lpg (usually around 28-30mpg on petrol) could reducing the pressure help with this (currently set at 1.4bar)?
by gazwad
Mon Mar 25, 2019 8:27 am
Forum: Having Problems ?
Topic: part throttle hesitation
Replies: 35
Views: 1538

Re: part throttle hesitation

so after driving on petrol then gas at 1.4 bar pressure to re-plot the lines I tweaked the map to get the lines pretty close to each other and the hesitation has completely gone, it seems to run better and power has improved on gas (it was slightly sluggish on gas before). I'll keep tweaking the map...
by gazwad
Sat Mar 23, 2019 9:04 am
Forum: Having Problems ?
Topic: part throttle hesitation
Replies: 35
Views: 1538

Re: part throttle hesitation

I reduced the pressure to 1.4 bar, also cleared the blue and green lined on the multiplier map. Will drive it on petrol for a few miles to allow it to re-plot the line then switch to gas. Does the laptop need to be connected to the ecu for it to plot the map or will it just do it anyway?
by gazwad
Fri Mar 22, 2019 3:49 pm
Forum: Having Problems ?
Topic: part throttle hesitation
Replies: 35
Views: 1538

Re: part throttle hesitation

great thanks, loads to look at there then, shame you are so far away or i'd just get you to sort it! but i'll have a look at all of that and see how I get on. there is a fuel pressure regulator connected to a vacuum on the manifold. just as a side note, I've been getting around 18mpg on lpg (normall...
by gazwad
Thu Mar 21, 2019 8:10 pm
Forum: Having Problems ?
Topic: part throttle hesitation
Replies: 35
Views: 1538

Re: part throttle hesitation

I'm working on accessing the obd side but it's tricky as its and older obd2a ecu so my normal bluetooth code reader won't access it, will be borrowing a professional scanner soon so hopefully that will be able to read it
by gazwad
Thu Mar 21, 2019 3:45 pm
Forum: Having Problems ?
Topic: part throttle hesitation
Replies: 35
Views: 1538

Re: part throttle hesitation

ok, yes it seems to read the correct rpm so i'll leave it alone. and suggestions for thing to look at to try and fix the hesitation issue?
by gazwad
Thu Mar 21, 2019 12:16 pm
Forum: Having Problems ?
Topic: part throttle hesitation
Replies: 35
Views: 1538

Re: part throttle hesitation

one thing i noticed is the source of rpm signal is set to petrol injectors, should this be set to ignition coil as i know this is wired in to the stag ecu
by gazwad
Thu Mar 21, 2019 11:52 am
Forum: Having Problems ?
Topic: part throttle hesitation
Replies: 35
Views: 1538

Re: part throttle hesitation

the lead arrived and i've connected it up for a look, I understand what most of it means but i'm not sure what things should be set at so below are some screenshots of ths software, I have played about with the petrol to gas switch over settings a bit and managed to reduce the stalling when switchin...
by gazwad
Fri Mar 15, 2019 7:40 pm
Forum: Having Problems ?
Topic: part throttle hesitation
Replies: 35
Views: 1538

Re: part throttle hesitation

great thanks, i'll have a look at the software then when the lead arrives
by gazwad
Fri Mar 15, 2019 7:18 pm
Forum: Having Problems ?
Topic: part throttle hesitation
Replies: 35
Views: 1538

Re: part throttle hesitation

I stripped the injectors and they were spotless inside, i also managed to reduce the hose length from injector to to manifold to about 35mm. It seems to have improved slightly but the stutter is still there, i think the injectors are fine as the all seem to tap evenly and were in good condition inte...
by gazwad
Wed Mar 13, 2019 3:43 pm
Forum: Having Problems ?
Topic: part throttle hesitation
Replies: 35
Views: 1538

Re: part throttle hesitation

ah i see, I'll have a look to see if any of the self calibration has been left enabled etc. cheers
by gazwad
Wed Mar 13, 2019 11:44 am
Forum: Having Problems ?
Topic: part throttle hesitation
Replies: 35
Views: 1538

Re: part throttle hesitation

Thanks, I'll have a look at the calibration. I know the lambda isn't connected to the stag ecu, is this needed for calibration?
by gazwad
Wed Mar 13, 2019 10:34 am
Forum: Having Problems ?
Topic: part throttle hesitation
Replies: 35
Views: 1538

Re: part throttle hesitation

If the injectors can't be stripped or cleaning doesn't fix them I will need to replace them but I can't seem to find these particular ones for sale anywhere. Do all injectors have the same flow rate etc - what replacements are recommended? I think individual injectors with a hose in and out (separat...