whoever figures this out is god! injectors not firing ok heres the story, recently did an engine swap to a 383 HSR, everything is hooked up and ready to run and car wont start. it an 86 trans am, non VATS car. the car turns over freely and will run if i mist gas or starter fluid through throttle body. i took the top part off the hsr and crank the motor looking through intake ports at injector boss and see no gas from any of the injectors. i hooked a seperate 12volt source up to injector and it sprays normal as it should. the injectors plugs have power and i hooked up the lighbulb to the clip and it flashes. i relooked at all my harness grounds and all are accounted for and hooked up to a good ground. my ecm flashed code 12 and tried a diff ecu and still nothing. all injectors ohm are the same. i also checked the fuses and there fine too. i am totally stumped!!:gocrazy: please someone have something thanks in advance |
Re: whoever figures this out is god! injectors not firing can you hook up a volt meter to an injector and tell me what the volts are when cranking??is the computer 86 as well or a different year? |
Re: whoever figures this out is god! injectors not firing Are you getting gas to your rail? What's your fuel pressure? |
Re: whoever figures this out is god! injectors not firing
Originally Posted by tom86iroc
(Post 4267970)
is the computer 86 as well or a different year? |
Re: whoever figures this out is god! injectors not firing
Originally Posted by Viprklr
(Post 4268027)
Are you getting gas to your rail? What's your fuel pressure? |
Re: whoever figures this out is god! injectors not firing
Originally Posted by tom86iroc
(Post 4267970)
can you hook up a volt meter to an injector and tell me what the volts are when cranking?? |
Re: whoever figures this out is god! injectors not firing the Ground was my first idea..it could be a bad sensor that controls the injection pulse like the pickup coil in dizzy under ignition control module. or perhaps a disconnected tps sensor. it has to do with crappy reference signal to computer in order to fire the injeector? thats just what i think. what size injectors. did you get a new chip. gotta get a chip |
Re: whoever figures this out is god! injectors not firing
Originally Posted by transam85dudeman
(Post 4268135)
it could be a bad sensor that controls the injection pulse like the pickup coil in dizzy under ignition control module. or perhaps a disconnected tps sensor. it has to do with crappy reference signal to computer in order to fire the injeector? thats just what i think. |
Re: whoever figures this out is god! injectors not firing 1 Attachment(s) http://answers.yahoo.com/question/in...0054951AAoxZQQ "Pick-up coils send an electrical signal to the ignition module to trigger spark and fuel injectors. /Sends signal to the ignition module for spark,also to the engine computer for pulsing fuel injectors." thats what i read. my pickup coil took a dump on me once. the permenant magnet broke 6 spots. ill take a pic of it. there. see how the magnet was broken and the coil was fryed. when the magnet breaks. they become there own magnets and repel |
Re: whoever figures this out is god! injectors not firing IF it is bad? to replace you got to remove the dizzy cap, mark the two rotor positions or just turn the crank clockwise until tdc. remove the hold down clamp. remove the dizzy, next punch out the roll pin (recommed a new roll pin but id didnt bother with spending the dollar) and remove the dizzy gear, shims, (i had to add shims, my dizzy had a endplay of .060" i shimed to the endplay was 0.008") and remove the shaft., remove the module, condesor, pop out the c-clip and the ground screw and bam replace the pickup coil and and reverse the step to install. but use the module thermogrease under the module or itd burn up.. should start then. if not, advance the dizzy or retard until you can time it. |
Re: whoever figures this out is god! injectors not firing yeah i just ripped into my dizzy and its not broken everything looks fine....i was really hoping that was it....i have the small cap dizzy but still had the magnet just easier to see |
Re: whoever figures this out is god! injectors not firing test the ohms |
Re: whoever figures this out is god! injectors not firing 4 Attachment(s) |
Re: whoever figures this out is god! injectors not firing well after one hell of a weekend, i finally figured out what the problem was......after dude man had me lookin at the dizzy, i noticed that my oil pressure sensor connector was just sitting on top but not actually pressed on....i would have probably never made the connection with oil pressure sensor and no injectors firing but thats my luck....thanks everyone for your help its much appreciated |
Re: whoever figures this out is god! injectors not firing your welcome glad ya got it runnin |
Re: whoever figures this out is god! injectors not firing
Originally Posted by pearlphoenix
(Post 4268522)
well after one hell of a weekend, i finally figured out what the problem was......after dude man had me lookin at the dizzy, i noticed that my oil pressure sensor connector was just sitting on top but not actually pressed on....i would have probably never made the connection with oil pressure sensor and no injectors firing but thats my luck....thanks everyone for your help its much appreciated Wow, nice ending. Learned a lot! |
Re: whoever figures this out is god! injectors not firing
Originally Posted by Glenno
(Post 4268725)
Wow, nice ending. Learned a lot! |
Re: whoever figures this out is god! injectors not firing how does she run? fast? im going to invest in a bare block and build it up. put a bad *** super charger on it. drop it in a 74' trans am |
Re: whoever figures this out is god! injectors not firing
Originally Posted by transam85dudeman
(Post 4268771)
how does she run? fast? im going to invest in a bare block and build it up. put a bad *** super charger on it. drop it in a 74' trans am |
Re: whoever figures this out is god! injectors not firing
Originally Posted by pearlphoenix
(Post 4269404)
well i was actually surprised at how well it idled with the stock chip right at about 950rpm and sounded nice and lopey like i was hoping, i havent really got on it yet for 2 reasons, 1 my starter took a sh*t from all the abuse this weekend, and 2 i dont really wanna get on it til i get the chip installed make sure it sounds right before some hard pulls. |
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