CIS-E 1.8 16v Thermo Time Switch Wiring??

[HeyMayneItsB]

A PO had done the 1.8 16v engine swap in my Rabbit, but did a half-ass job, so I replaced the entire harness with a (supposedly) untouched PL 16v Scirocco one. However, there was no connector from the ECU for the thermo time switch

The PO had some round-a-bout loop from the harness to cold start injector, with one wire going to the thermo time switch and the thermo's other wire being looped around to the starter motor. But the cold start injector never worked with that setup, and I was having starter motor issues. How is the thermo time switch supposed to be wired? Isn't there supposed to be a brown connector coming from the ECU through the main engine harness?

Unrelated, but I'm also missing one of the two O2 connectors on the harness, leading me to wonder if either the harness is not from the engine it was claimed to be from or it had actually been cut up...

[HeyMayneItsB]

Bueller...

[ps2375]

Have you looked in the wiring diagrams in a Bently Manual?

[HeyMayneItsB]

Have you looked in the wiring diagrams in a Bently Manual?

Yep, and I have yet to decipher them I like pictures

I have both the Mk1 and Mk2 Bentleys, and I've searched using several key words on the forums for both threads and posts, and all I know is that the thermo time switch controls the cold-start valve and, from what I've heard, it's supposed to have a connector for it to the ECU on the engine harness. But mine does not.

[ps2375]

I don't know what to say.

[20v_boost]

The thermo-time switch does not connect to the "ECU". I'll have to look at my bently when I get home but I'm sure its a stand-alone kind of circuit.

Basically when the thermo-time switch is cold, it fires the cold-start injector. It receives heat from 2 sources, heat from the cylinder head, or heat from an electrical current that passes through it while you're cranking. So if the engine is warm, it doesn't fire the cold start injector. If you are cranking for a while, it stops firing so you don't flood your engine.

-Alex

[Madvwz]

Could there be a fuel enrichment module connected (possibly home made) that is throwing you off?

Edit: Rather, an attempt at a fem?

[HeyMayneItsB]

The thermo-time switch does not connect to the "ECU". I'll have to look at my bently when I get home but I'm sure its a stand-alone kind of circuit.

Basically when the thermo-time switch is cold, it fires the cold-start injector. It receives heat from 2 sources, heat from the cylinder head, or heat from an electrical current that passes through it while you're cranking. So if the engine is warm, it doesn't fire the cold start injector. If you are cranking for a while, it stops firing so you don't flood your engine.

-Alex

Well then the PO may have been on the right track, but a "close but no cigar" type deal because it was all kinds of ghetto and not working anyway.

Could there be a fuel enrichment module connected (possibly home made) that is throwing you off?

Edit: Rather, an attempt at a fem?

Nope, and I threw the old hacked up harness in a box (in case I need some OEM connectors or wiring later) and installed an entirely new harness, repairing every broken or ghetto wire connection in the bay in the process. The thermo time switch is the only thing not right (currently just not connected at all), as well as the mysterious lack of an O2 connector... (only the spade connector is present).