injector problems

mark loupis · Post by **mark loupis** » Sun Oct 26, 2014 2:04 pm

Hi i am new to all of this and hope some 1 can get me pointed inthe right direction . Ok what is happening is that i built a ms2 and when i first hooked it up to my car i got it to start and run but not idle so i did the pwm mod like shown in the manual just below step 62 but after doing it the car wont start i hook the ms2 to the jimstim and the injectors are working and the ignition is firing so hook it up to the car and wont start unles you spray starting fluid in the throttle bodie then only runs until it runs out . i have power out to the injectors but when i hook a light to it and crank it it wont make the injector test light blink i have tested the harness and it is good . if i take wire and go from ground to the injector signal wire i can make the injectors fire do i need to build some sort of realy? the car is a pontiac fiero with a 1998 Audi A8 4.2 V8 engine it has bosch injector i will try to remove 1 to make sure of what it is

Matt Cramer · Post by **Matt Cramer** » Mon Oct 27, 2014 8:03 am

Can you post a data log of an attempted start and a copy of your MSQ? This will give more info about what's happening.

mark loupis · Post by **mark loupis** » Tue Oct 28, 2014 5:15 pm

I will get that but this all happend after i did amod to the pwm for the idle valve to try to get it to idle

plonker · Post by **plonker** » Wed Oct 29, 2014 9:23 am

Maybe your idle valve is letting in too much air,have you tried it with the idle valve wiring disconnected..?

John

mark loupis · Post by **mark loupis** » Thu Oct 30, 2014 9:49 am

I found what was wrong when i built the pwm circuit with a radio shack tip122 i din't have the mica insolator so it was grounding out but i din't think that the mica was that big of a deal because they worded it should use not must use in the manual so it looked like a suggestion to me so all is good now and it runs but i do need to tune it so thanks for the help

Matt Cramer · Post by **Matt Cramer** » Fri Oct 31, 2014 4:54 am

Some manufacturers' TIP120s are fully insulated and some are not, so it depends on the one you are using.

mark loupis · Post by **mark loupis** » Fri Oct 31, 2014 2:17 pm

no bigt deal she is running now so this is a video of it running the video is realy bad though i need a better canera
https://www.youtube.com/watch?v=XJ0BG-6jeSs

MSefi.com read only forum (Jan.15,2018)

injector problems

injector problems

Re: injector problems

Re: injector problems

Re: injector problems

Re: injector problems

Re: injector problems

Re: injector problems