348 Hot Start problem......FIXED!

Coolness.

Is that the Bosch part number?

 

I assume it is correct to say that you had a "no crank" problem, rather than a "no fire" problem??

I don't think WR1 is a Bosch relay number, but I could be wrong. That sound like a "kit" number, perhaps, for the relay, harness, and instructions.

Good on you for fixing it yourself!!

 

believe this has been discussed: boosting the power from key to starter was the answer, even Ferrari recommends this for 'hot' start issues on the 348, TR, and 355 engines.

 

Nice work mate.

Besides Ferraris, this issue is with alot of cars. I even had to do it to my old Ford Fairlane 10yrs ago.
I never knew that Ferrari recommends this for 'hot' start issues on the 348, 355 and Tr. I have not had any issues with mine, but I may wire in a relay anyways. Will only help the situation. Thanks for sharing Rik.

 

sure. I understand the clean wire issues, and starter solenoids, and the alternator [sometimes] issues. But Ferrari of San Francisco, who is owned by the Factory, not a franchise, has this as a 'fix' for these cars. Used to sit in a lot or places, pretending to talk to someone on the cell, while it cooled down, but, not always in time...sometimes took over 1/2 hour <yikes>

Ferrari gave me an $80 fix, installed under dash....will try to get part numbers etc., they did this on the 30k belt change.

NEVER had an issue since. )

 

Cool cool.

 

Isn´t this the old story with the bullet connectors?

I thought all those problems originated from the bullet connector under the airfilter box.

It is a lot easier to change the cable from the battery to the starter than all this with relays and stuff.

Or am I completely lost here?

Is this another issue?

//B//

 

These cars are amazing. Never a dull moment. Now I have something rather queer when it cames to the blower. The fan goes faster when I turn the steering wheel either left or right. Sometimes it even stops when I drive straight forward and starts again when I turn left in a crossroad. I have been crawling under the brake and clutch to see what is going on but nothing to find there. Guess it has something to do with an earth connection somewhere. Rather peculiar if you ask me.'

//B//

 

Needed to replace my battery today so with my head mechanic GG in charge we decided to install a relay into my start circuit for others to use as a guide should they want/need to install one also

Pic 1: Starter motor and also the white wire which is the feed off the ignition barrel to start the engine.

Pic 2: My meter reading the start wire voltage before the relay install, 12.05 Volts

Pic 3: Material, 1 12Volt relay, heavy duty wire

Pic 4/5: Bosch relay

Pic 6: My meter reading the start wire voltage after the relay install, 12.75 Volts

Pic 7: Where I mounted the relay, on the right hand upper cam cover plate.

I should of have done this earlier, my engine starts ALOT quicker now. A increase of 0.7 Volts to the starter motor ignition wire, not bad for a couple of hours work, only cost me a few bucks for a relay and some wire.

Hope you enjoy
Image Unavailable, Please Login
Image Unavailable, Please Login
Image Unavailable, Please Login
Image Unavailable, Please Login
Image Unavailable, Please Login
Image Unavailable, Please Login
Image Unavailable, Please Login
Image Unavailable, Please Login

 

Be VERY careful when doing this. Shrink tube the relay well to waterproof the can.
Some years back we had a TR getting the engine washed and the starter all of a sudden fired up. Had it been in gear the results could have been terrible.

Dave

 

VERY good post PAP: this would have saved me about $70US.

 

Hello Dave, Thanks for the warning, I've seen the old style steel cased relays absorb water but never had an issue with the plastic case versions but you never know your luck around here so my head mechanic and I purchased a piece heat shrink to cover the relay usally used to put over the end of high voltage cable after you cut a lenght off, only cost $5.00 too and worked alot better than I expected.

Feel free to ask any questions
Image Unavailable, Please Login
Image Unavailable, Please Login
Image Unavailable, Please Login
Image Unavailable, Please Login

 

No worries Rik, I'm glad I could help out

 

PaP,


That will work just fine. The TR that started on its own had a plastic relay that once dried out worked fine. Your shrink tube fix would rest all of my concerns with this mod.

Dave

 

Thanks for your input, That's fair enough with that TR relay, I told my brother what you said and he told me about that heat shrink resin tube, from now on any install I do that tube will be a must for any other relays we install. Would hate to try and cut the shrink off should the relay fail, you could nearly call that relay solid state now with all that resin melted around it now

 

Very nice mate.

But can you explain a bit more the wiring itself, what connects in what?? I'll appreciate that, a lot.

Regards,

Mont

 

Will do mate. Will get back to you as soon as I can with wiring description.

 

I purchased the Bosch kit. It includes a wiring diagram and all the wires and relay. It took all of 30 minutes to install and my hot start problem is gone for good. That is the correct part number for the kit.

 

Hello Mont, This is how I wired the relay

Pin 86> White wire that originally goes to the starter motor start soleniod to start engine
Pin 85> Earth wire to engine
Pin 30> Heavy duty wire straight from battery positive + post terminal (Fused)
Pin 87> Heavy duty wire straight to starter motor start soleniod to start engine
Pin 87a> Unused

Not only did it increase my voltage to my starter motor soleniod by nearly 1 Volt, I should of checked how much extra amps I am pulling now to my starter motor, it must be alot more because my engine has never started so quickly
Image Unavailable, Please Login

 

Is that a 40 amp relay??

 

30A, but Gothy it's only for the pull in soleniod on the starter motor which is more than enough amperage

 

Many thanks... This way I'll do the same to my Maserati Shamal...
It was quite a good idea to "post" this issue, here.

Regards,

Mont