key off & injectors spray !

For discussing injector selection,manifold modifications, throttle bodies, fuel supply system design and construction, and FIdle valves and IACs.
Forum rules
Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.

If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0).

If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days

The full forum rules are here: Forum Rules, be sure to read them all regularly.
Post Reply
kastrupj
MegaSquirt Newbie
Posts: 2
Joined: Mon Apr 23, 2012 4:49 pm

key off & injectors spray !

Post by kastrupj »

Hi , I have a MS2 v3 with 2.684 firmware , running a 2.5 turbo with 42lb High Imp. Injectors . I was tinkering with tucking some of the harness and decided to look at the spray of the injectors. small puff at key on as expected, cranking looks nice also. as soon as I turned the key off the injectors opened and sprayed till they finally expelled the 40+ psi of fuel pressure out off all 4 .

I've also had a hot restart problem which I now think is directly linked to the inj's staying open and flooding the motor every time I shut it off. and washing down the cylinders all the time , and fouling my spark plugs. Duh? :(

any-who what should I be looking to correct to make it right ? adding a separate relay for the injector feeds ?

I'm running a gm single wire alternator and edis 4 other than that it's been reliable except for hot restarts
thanks for any help !
Top
Matt Cramer
Super Squirter
Posts: 2951
Joined: Sat Jul 03, 2004 11:35 am

Re: key off & injectors spray !

Post by Matt Cramer »

Make sure your harness is wired up in such a way that the injectors do not receive power with the key off. The standard MegaSquirt diagram has the MS and injectors powered off the same relay to prevent exactly the problem you're having.
Top
kastrupj
MegaSquirt Newbie
Posts: 2
Joined: Mon Apr 23, 2012 4:49 pm

Re: key off & injectors spray !

Post by kastrupj »

Thank you 4 the reply , I will check my work and report back.
Top
Post Reply

Return to “Injectors, Fuel & Air Supply”