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EJ22 swap starts & runs for 20 sec, then dies.
Posted 26 July 2011 - 06:42 PM
Posted 26 July 2011 - 08:37 PM
Sounds like the ECU is cutting off the injector pulse for some reason.
Posted 26 July 2011 - 08:55 PM
check those injector pulses GD mentioned with a noid light?
did the engine that was previously in it run fine (meaning exhaust is fine?)
85 is FI, not carb, right?
Posted 27 July 2011 - 10:59 AM
It was running before the swap, except for major headgasket issue.
Gonna rent a QUALITY fuel gauge and test the pressure....it seems to possibly be a fuel pump issue.
Posted 27 July 2011 - 11:35 AM
good luck hopefully it's something simple like fuel supply.
Posted 27 July 2011 - 12:30 PM
Most likely not a fuel supply issue unless the pump is losing power somehow..... which is possible I suppose given how you claim it's wired. Why is the ECU not controlling the fuel pump relay? Perhaps the ECU is shutting off the injector pulse because it doesn't see a relay coil for the fuel pump - potentially a safety hazard in an accident if the fuel pump should continue to run thus the ECU's software shuts it down..... you haven't got it wired correctly so it could be anything! Get the wireing proper and find out if the ECU has any complaints - it's a self-diagnostic system.
Edited by GeneralDisorder, 27 July 2011 - 12:53 PM.
Posted 27 July 2011 - 01:59 PM
Posted 27 July 2011 - 02:22 PM
Posted 27 July 2011 - 04:25 PM
Posted 28 July 2011 - 12:00 AM
Posted 28 July 2011 - 12:54 AM
it took a fuel pressure tester to show me the problem. the pump would build pressure when starting but would drop immediately after engine was running.
my issue ended up being a leak, but in my search for a solution i checked the fuel pressure regulator, fuel rail damper, filter, and pump.
it may be related to the pump not being triggered by the ecu, but how would the ecu know? can it sense electrical load? or perhaps its part of an electrical loop?
would make sense in the above mentioned accident scenario when you would want that to shut down immediately with the engine.
so yeah, check the fuel pressure, as i recall it should be between 40-45psi, someone correct me if im off
Posted 28 July 2011 - 01:44 AM
Posted 28 July 2011 - 04:46 AM
So check you have no leaks between the MAF and the throttle body and IAC. No unhooked PCV hoses, no untightened clamps, ect.
It will start because of the cold start enrichment, but as soon as the ECU sees the rpms come up, it stops that, the MAF indicates no air getting sucked into the engine, so it puts no fuel in and the engine dies. A failed MAF can also cause this.
Failing that, go after the fuel pump. Also make sure the hose leading from it to the tank isn't kinked.
Don't spray ether into an engine, it's bad stuff and can easily lead to cracked pistons. It's for direct injection diesel engines only. With IDI diesel engines it can knock the prechambers out of the heads and destroy the engine. Gas engines aren't strong enough to take the detonation of ether at all. I trashed a nice old chrysler 6 using ether to get it rolling when I was younger and dumber.
Edited by WoodsWagon, 28 July 2011 - 04:53 AM.
Posted 28 July 2011 - 09:59 AM
GD...I will text you later today. Thanks
Posted 28 July 2011 - 09:21 PM
Thanks GD for the advice. Rewired through the ECM....in the process found a broken wire and fixed it. Don't know which helped, but.......IT"S RUNNING!!!!!
In fact laid down rubber in 2nd gear. DANG!
Still have a bunch of stuff to clean up. The exhaust has a rattle that I need to correct. The suspension is toast and needs a sport suspension anyway. The brakes are a little squishy, but I have pads ready to go. But.....I think she is good to go! Thanks for the help everyone. I am sure I will have more questions, but for now I am reveling!...and revving!
Next up. Suspension and getting the 14" pugs powder coated and put on....and getting all the tools out of it.lol
Posted 28 July 2011 - 09:34 PM
Posted 10 December 2011 - 07:43 PM
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