Intermittent No-Start Problem
Thread Starter
Teching In
Joined: Dec 2008
Posts: 7
Likes: 0
Intermittent No-Start Problem OK, I wanst sure where to post this. I could really use some help! (wheres my gun?)
I started the 98 Formula up yesterday, as I was leaving the house the car died.
-It cranks but does not start.
-Fuel pressure checks fine during cranking.
-I have spark because I can spray carb cleaner into the TB and if fires right up, for a second. I have to assume the injectors are not pulsing.
-The security light is OFF when cranking.
-I swapped relays and fuses for injectors, fuel pump, and ignition as well. No help.
(Can the crank position sensor fail for the injectors, but not the spark control? Knowing it runs on carb cleaner tells me spark signal has to be fine)
Could it simply be the PCM injector drivers died?
This happened a month ago, but it when it happened before the car didnt die on me, it just wouldnt start one day. Tested all I could, it magically started up the next morning and ran fine for over a month.........
Thanks for any help!
I started the 98 Formula up yesterday, as I was leaving the house the car died.
-It cranks but does not start.
-Fuel pressure checks fine during cranking.
-I have spark because I can spray carb cleaner into the TB and if fires right up, for a second. I have to assume the injectors are not pulsing.
-The security light is OFF when cranking.
-I swapped relays and fuses for injectors, fuel pump, and ignition as well. No help.
(Can the crank position sensor fail for the injectors, but not the spark control? Knowing it runs on carb cleaner tells me spark signal has to be fine)
Could it simply be the PCM injector drivers died?
This happened a month ago, but it when it happened before the car didnt die on me, it just wouldnt start one day. Tested all I could, it magically started up the next morning and ran fine for over a month.........
Thanks for any help!
Thread Starter
Teching In
Joined: Dec 2008
Posts: 7
Likes: 0
Well, I found a shop that will come to you and scan the car for 50 bux. Pretty sweet being the dealer wants 100 just for a scan.. whatever. (and Id have to have it towed).
Dealer and the mech. both think it sounds like the ecm.. guess Ill find out soon.
One thing I did forget to mention, right after the car first died, when I turned the key to the on position my tach and speedo were going haywire and I could hear some relays clicking like crazy in what sounded like the dash/center column area.
Thanks,
Jer
Dealer and the mech. both think it sounds like the ecm.. guess Ill find out soon.
One thing I did forget to mention, right after the car first died, when I turned the key to the on position my tach and speedo were going haywire and I could hear some relays clicking like crazy in what sounded like the dash/center column area.
Thanks,
Jer
Thread Starter
Teching In
Joined: Dec 2008
Posts: 7
Likes: 0
F me... per usual Yep.. my gut didnt let me down.. ECM.
After the scan was giving info intermittently, they guy decided we should pull the harness off the ecm just to peek at it. 3 of the pins in the blue connector are burnt.. one of those pins pulled out with the harness and is stuck in it. Corrosion all about that connector.. Im assuming either the computer shorted internally, or some moisture got in there somehow. Either way, I need a new computer. (Hopefully the connectors will clean up nice, I DO NOT want to have to do a new harness, or have to splice in new connectors.........)
After the scan was giving info intermittently, they guy decided we should pull the harness off the ecm just to peek at it. 3 of the pins in the blue connector are burnt.. one of those pins pulled out with the harness and is stuck in it. Corrosion all about that connector.. Im assuming either the computer shorted internally, or some moisture got in there somehow. Either way, I need a new computer. (Hopefully the connectors will clean up nice, I DO NOT want to have to do a new harness, or have to splice in new connectors.........)
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
Five Reasons the Camaro Was the Most Pivotal Player in the Pony Car Wars 2.0
Brett Foote
