1990 SW20 N/A Cold start + electrical problem.

Re: 1990 SW20 N/A Cold start + electrical problem. (Reddtarga)

Thu, 11 Jun 2015 15:44:33 GMT

The problem is that there is no connector that goes to the black plug below the greenish one (which I believe is the coolant temp sensor). Could the fact that theres no connector going to it be what is causing my 2 to have trouble starting when its cold? And has anyone had a similar problem to me before?

The black sender is the cold start injector timer switch and should have a wire going to it on both the NA models as well as the turbos.
Look for a wire/plug on the loom somewhere alongside the coolant sender wire. Maybe cut or taped up.

Re: 1990 SW20 N/A Cold start + electrical problem. (rikkir)

Sun, 07 Jun 2015 20:25:55 GMT

Good to hear that you got it sorted.

Re: 1990 SW20 N/A Cold start + electrical problem. (Sweetchilliphilly)

Sun, 07 Jun 2015 16:26:01 GMT

The new coolant temp sensor seemed to fix my cold start problem, as for the black plug, i believe it is for the cold start injector on the turbo model.

Re: 1990 SW20 N/A Cold start + electrical problem. (Sweetchilliphilly)

Thu, 04 Jun 2015 21:45:22 GMT

Anyone?

1990 SW20 N/A Cold start + electrical problem. (Sweetchilliphilly)

Wed, 03 Jun 2015 19:15:35 GMT

I have this problem with my mr2 where the rpms fluctuate when starting cold, sometimes even stalling. Once the car has sat idling for a minute it runs great. This problem has persisted through me doing a minor rebuild on the engine. I believe it may have something to do with the coolant temp sensor, so I ordered a new one and I've ran into something odd. See picture.

The problem is that there is no connector that goes to the black plug below the greenish one (which I believe is the coolant temp sensor). Could the fact that theres no connector going to it be what is causing my 2 to have trouble starting when its cold? And has anyone had a similar problem to me before?