Ignition System: Cranking very well but won't start 75 1.8FI, Fixed: Major concern Ignitor and #3 fuel injector. :THANKS TIM! Options

[ndfrigi]

Need help diagnose from members!

Well, last saturday Feb. 13 I joined fellow members at the Aliso Viejo Cars and Coffee which is about 30 miles one way. After the event, drove home and for less than 2.5 miles away from home at a traffic light, my tachometer is bouncing between 2.5k to 3k rpm (sorry not 3.5k to 4k rpm on what I have said on the other thread). But the actual is pretty much on normal idle of less than 1k rpm. When about to go on green light, engine died. Tried to start the engine but it is just cranking (cranking very well), but the engine won't engage.

Some good members here already mentioned about ignition circuit. Well today, I was able to checked and opened the rotor cap, and I found out that I have/had Pertronix Electronic Ignitor which I already forgot since the last time I opened it last 2011 (Since the engine is running very well after I was able to make it run after fixing it from the time I bought. I haven't open it since then. I even bought lately a spare of contact points and condenser to replace it soon).

So a friend of mine was here this morning and asked him to start the engine and try touching at the base cover of my front mounted fuel pump and I don't feel any vibration. So we tried to unplug fuel hose from the SS engine tunnel lines which is a direct supply line from fuel pump to engine bay before the fuel injector line. We did crank the engine but no fuel is spitting out from the line.

So is it fuel pump issue I have?

In addition, a member also mentioned about the fuel pump relay from the relay board. But after opening my relay board cover. I noticed there is some wiring that was changed/modified. No round relay for the fuel pump terminal.





Thanks again for your help!

[ndfrigi]

Hi again fellow members:

Update: Still same issue.
After finishing the 71 1.7 megasquirt that Bro. Bob bought from me which is now running and he is enjoying driving with it while fixing some details with the car.
I was able to do several testing, swapping parts on my 75 1.8 FI.

1. Ignition switch was new after it failed during several testing.
2. Swap following parts:
* ECU (no known condition but borrowed it from Abe that came from his 75 1.8 Ljet which is now using carb).
* Thermo time switch
* Resistor pack (2 used spare)
* ignitor to standard points with condenser and to new ignitor. Several swapping was made.....
* dual relay (2 used spare)
* cold start valve
3. Blue coil to another blue coil and with new flame thrower coil
4.Did several wiring continuity with ECU, dual relay, resistor pack, fuel injector plug... and it looks all okay
5. Fuel pressure checked with 35-36 psi
6. Good spark on the other end of the plug wire (end wire from coil to center of distributor cap).

MY CONCERN NOW IS: NO FUEL SPRAY on both 3 and 4 injectors. (didn't check number 1 and 2 since there is no much room because of the air filter and I assumed it will be the same with number 3 and 4). I Removed number 3 and number 4 fuel injector from intake and insert them both to a bottle.

Any other direct items should I check now?
Or anyone from Orange county could help me that I can pay like $100 just to help me share his knowledge with FI at my place and I will do the labor work.


thank you!

followed this diagram from bowlsby to check continuity and other related parts.