Hi all
Currently running in a new forged engine. Have covered 240miles so far!
Running in map by ryan g!
Right out in her today and all of a sudden major miss fire and then cut out completely so coasted to a stop! Also attempted 3 starts of engine to be greeted with black smoke and fuel vapour out the exhaust!!!
Turns out to be injector 2 stuck open (1000cc delphis)
How much damage would this have done to the bore (bore wash)? Misfired for 5 seconds at about 4000rpm and then the 3 attempted starts?
I then towed the car home and cracked my bumper! Lol!
Nightmare day!
Thanks all
Injector stuck open on new build engine
Moderators: IMOC Moderators, IMOC Committee Members
Re: Injector stuck open on new build engine
Leave the plug out so the vapours can dry and change the oil. Should be OK. I might be tempted to put a tiny amount of oil down the plug hole and crank it over with the plug out (and leads off obv) just to lube up the upper cylinder wall / top rings.
Re: Injector stuck open on new build engine
Yeah i hope it will be ok, i have a friend coming out with an inspection camera to double check.
Can you get injectors rebuilt? Although i think this one may be too far gone?
And if i change it to a new injector will i need to check the map?
How reliable are these delphi's?
Cheers
Can you get injectors rebuilt? Although i think this one may be too far gone?
And if i change it to a new injector will i need to check the map?
How reliable are these delphi's?
Cheers
Re: Injector stuck open on new build engine
As far as I'm aware you can only have injectors cleaned, not repaired.
Do a compression test across the cylinders, that should give you an idea as to whether you have done anything long lasting to cylinder No.2.
Do a compression test across the cylinders, that should give you an idea as to whether you have done anything long lasting to cylinder No.2.
Blue Lexus RCF
Black MKIV UK Manual Supra
Green MK2 MR2 Tin Top
Black MKIV UK Manual Supra
Green MK2 MR2 Tin Top
Re: Injector stuck open on new build engine
bolton wrote:Yeah i hope it will be ok, i have a friend coming out with an inspection camera to double check.
Can you get injectors rebuilt? Although i think this one may be too far gone?
And if i change it to a new injector will i need to check the map?
How reliable are these delphi's?
Cheers
Borescope is great idea, and like Ryan says- change your oil before you run it again. FWIW I reckon you'll be ok, the cylinder wall shouldn't have glazed that quickly.
Sounds like it's either worth getting all four injectors flow tested, or swapping out for a fresh set. The map should be ok as it's only for running in so should be extremely conservative...if it was a final, all out map then I'd consider a quick check over.
I reckon you'll be ok, but I'd be doing exactly the same thing as you: trying my best to confirm.
Re: Injector stuck open on new build engine
Yeah changed oil as soon as i got it home!
So i should get one new injector then get all 4 flow tested?
So i should get one new injector then get all 4 flow tested?
Re: Injector stuck open on new build engine
I'd get all four checked- if one's failing, then there's a risk the others may follow suit shortly- you need to know if it's failed, or just stuck open cos of dirt/ debris in it.
Might be worth changing your fuel filter as well (if it hasn't been done for a while)
Might be worth changing your fuel filter as well (if it hasn't been done for a while)
Re: Injector stuck open on new build engine
Yeah ill order a new fuel filter! They were brand new injectors with only 240 miles on them. Does seem strange! But like you say worth getting them checked out!
Re: Injector stuck open on new build engine
Could just be dirt in your fuel lines from assembly?
Re: Injector stuck open on new build engine
Wouldnt that shown up earlier than 240 miles in?
-
- IMOC Affiliated Trackday Organiser
- Posts: 10506
- Joined: Tue Jan 25, 2005 9:49 am
- Location: South Yorkshire
Re: Injector stuck open on new build engine
bolton wrote:Turns out to be injector 2 stuck open
Or injector driver is foobared.
Have you confirmed it is the injector and not the driver?
Re: Injector stuck open on new build engine
Yeah 100% injector it pi*sed out fuel even with the plug disconnected when i tested it.
-
- IMOC Affiliated Trackday Organiser
- Posts: 10506
- Joined: Tue Jan 25, 2005 9:49 am
- Location: South Yorkshire
Re: Injector stuck open on new build engine
bolton wrote:Yeah 100% injector it pi*sed out fuel even with the plug disconnected when i tested it.
OK.
Are they genuine Delphi injectors? We had a set of fake paddy field SARD 800s give us a load of issues til we realised they were not genuine.
Re: Injector stuck open on new build engine
I believe so brought from a reputable seller in the states who is also an affiliate on mr2oc.com
I have been told its unlike Delphi's to fail tho.
I have been told its unlike Delphi's to fail tho.
-
- IMOC Affiliated Trackday Organiser
- Posts: 10506
- Joined: Tue Jan 25, 2005 9:49 am
- Location: South Yorkshire
Re: Injector stuck open on new build engine
bolton wrote:I believe so brought from a reputable seller in the states who is also an affiliate on mr2oc.com
I have been told its unlike Delphi's to fail tho.
That's why i asked. Injectors are normally highly reliable.
Re: Injector stuck open on new build engine
Ill take a pic maybe you could tell me more! Slightly annoyed jus hoping my piston/bore is ok!
Re: Injector stuck open on new build engine
bolton wrote:Ill take a pic maybe you could tell me more! Slightly annoyed jus hoping my piston/bore is ok!
It sounds like dirt in the fuel line that has jammed the injector open, what filter and fuel lines are you using?
Designer for turbo set ups on F1 cars, and Nitrous Oxide Systems of the USA in the 80s
Re: Injector stuck open on new build engine
Using a walbro 255, 1000cc top feeds (racer x top feed kit), -6AN Redhorse performance fittings, standard toyota fuel filter, braided lines.
Also uprated the fuel pump wiring, removed relay and resistor.
Also uprated the fuel pump wiring, removed relay and resistor.
Re: Injector stuck open on new build engine
My money's on debris from assembly- maybe a bit of outer braid or something, it's just taken a while to work it's way into an injector and then got itself wedged in there.
Your plan remains the same in my eyes- pull all four injectors and get them inspected by a pro, if it's jammed open they should be able to clear it and capture the debris to give you a clue as to where it came from.
If it is debris, then I would be pulling all the lines down stream of the filter, and the rail and regulator, and cleaning them all very carefully.
Your plan remains the same in my eyes- pull all four injectors and get them inspected by a pro, if it's jammed open they should be able to clear it and capture the debris to give you a clue as to where it came from.
If it is debris, then I would be pulling all the lines down stream of the filter, and the rail and regulator, and cleaning them all very carefully.