COP Install No Start
#1
COP Install No Start
After what I think was adequate searching, I think im stumped with why my recent Toyota COP install. Harness was made to Lazzer 1.6 PNP diagram. I am going to try to present my findings in a TLDR format. Pertinent info below:
Year: 1990
Engine: 1.6
ECU: MS2 (Tune and log will be posted tonight)
Dwell: Cranking-5.5 Running-2.5
Injectors: 420cc rx8
Plugs: BRK7E
Gap: .045
Capacitor in COP harness: Yes (Added after inital troubleshoot, no change in findings)
Resistor between IG- and B+: Yes
Harness wiring: 18g
Observations:
-Car ran on stock wires and coils prior to install
-Strong spark when plugs pulled and grounded to valve cover
-I get fuel when cranking--plugs wet and unburnt fuel smell
-Compression is good across all cylinders
-Occasionally I will get a brief stumble (bump bump after releasing starter)
Attempted the following with no change:
-Disconnected 1&4, then 2&3
-Plugged 1&4 harness to 2&3 coils
All of this leads me to think two things:
-Too much fuel
-Timing incorrect
I find both of these to be highly unlikely due to the fact that I was running prior to the install and made no changes other than adjusting dwell, but please correct me, because apparently im wrong somewhere!
Year: 1990
Engine: 1.6
ECU: MS2 (Tune and log will be posted tonight)
Dwell: Cranking-5.5 Running-2.5
Injectors: 420cc rx8
Plugs: BRK7E
Gap: .045
Capacitor in COP harness: Yes (Added after inital troubleshoot, no change in findings)
Resistor between IG- and B+: Yes
Harness wiring: 18g
Observations:
-Car ran on stock wires and coils prior to install
-Strong spark when plugs pulled and grounded to valve cover
-I get fuel when cranking--plugs wet and unburnt fuel smell
-Compression is good across all cylinders
-Occasionally I will get a brief stumble (bump bump after releasing starter)
Attempted the following with no change:
-Disconnected 1&4, then 2&3
-Plugged 1&4 harness to 2&3 coils
All of this leads me to think two things:
-Too much fuel
-Timing incorrect
I find both of these to be highly unlikely due to the fact that I was running prior to the install and made no changes other than adjusting dwell, but please correct me, because apparently im wrong somewhere!
#6
Quite possibly solved this issue. I decided to take a look at my MS2 board, purchased from a local club member. Apparently I, and he, have been running an inverted spark mod, with non-inverted spark setting. Dunno how this is possible, but im going to test tomorrow, and hopefully scratch my head as to how I ran this way for so long.
So much for my interpretation of a "strong spark"
So much for my interpretation of a "strong spark"