I'm new to this site.
I have an '88 22re that won't start, but of course there is more so I'll do my best to explain.
A couple of years ago I dropped a different engine in due to a blown head gasket. It ran fine for 2 years. It started up cold immediately but when warmed up it would take along time but still started. Also, occasionally, when i turned the key there was nothing but if i held the key in the start position, the starter would catch by itself after a few seconds and it would start. Now...
A couple months ago I blew another head gasket.
The mechanic, (not familiar with 22re), said my head was cracked so it is now new also. When he finished, it fired right up even with a broken cold start injector sensor that he broke. I replaced it with a junk yard sensor from a different engine. The part number was different but it was brown and plugged right in. within 1 week something strange happened. It would start up but when i died it out and tried to restart it, it wouldn't even turn over...nothing...dead. After waiting up to 5 minutes it would fire right up. This lasted about 1 week and now won't start and mechanic can't figure out what the problem is. He traced it to a "relay" inside the pass. side kick panel which was only getting 6 volts. So he ran a jumper wire from the battery, through the firewall to the relay. It started right up and I drove it for about 1 week like this. But again, now it won't start. I didn't mention that it always started with starting fluid only until it was used up.
When a noid is connected to cold start injector, sometimes it lights up for 1 blink but most of the time there is nothing. The mechanic replaced the fuel pump. Now he is thinking it is the injector resistor mounted on the pass. side fender in the engine compartment. All fuses appear good.
PLEASE help!!!

 

The mechanic said there are 15 volts going in and coming out of the injector relay but NO ohms. Also, no injector pulse.