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]

well after few weeks of not really taking care of my 75. Now I'm back after finishing (almost done) the 71 1.7 Megasquirt rear ear suspension replacement and last week we were able to install the engine back. Now the 71 is running after I bought it last 2014.

Well, this afternoon, I tried doing some checking and did a few trial starting the car and still won't start. What I noticed, the ignition key seems having some problem, it requires me to turn the key a few tries before the engine crank or starter turns until it was totally not cranking anymore. So i assume it was the ignition switch need replacement. I took the ignition switch from a roller car and after trying to start it again, same issue does not crank.

Is there something I should check why it is not cranking anymore even after replacing the ignition switch? Battery has around 12.8 volts (meaning battery is not drain), checked the ground cable of tranny with under rear trunk, checked wires connected to the starter.

Any other things should I check to make it crank again and to be able to go back on my original problem?