Evil Bunny

Hoping for some advice.

964 is not starting, more specifically it cranks strong but will not fire.

Background, the car recently had a major service plus some, perhaps relevant among other items, the battery, fuel filter and plugs were changed, following the service the car was running sweet.

Into winter storage, since the service the car has covered 60 miles, I started it a month ago, it started first time no issues. (Battery is on a C-Tech conditioner) – I tried to start it this weekend, nothing, it cranks first time I can hear a click from the DME relay and then two quick clicks from the fuel pump, no whirring, but it will not fire.

Since the last time it ran perfectly nothing has been changed, added or modified.

Having used the search function I intend to change the DME relay and check the connections on the DME unit under the seat, I did take the foam floor boards out so may have knocked something.

As the car is in storage and I need to travel to get to it, if the above does not work I would like to carry out further investigation thus I would like to ascertain if I am getting fuel and a spark.

Can anyone explain the procedure on how I would check for fuel? And the procedure for checking for a spark?

Following on from if no success a trip to a local Indy is calling, but as the car will not start getting it there is a PITA!

Any help appreciated.

onceover

Definitely start with the DME relay.

Spark is easy - pull one of the upper plug wires out, install a plug into it (can use the one in the engine if you feel like unscrewing it), holding the plug wire touch the threaded section of the plug to some exposed metal on the car. Have a buddy crank the car over and look for spark.

Fuel can be done similarly - unscrew the line from the fuel filter, put it in a small container and crank the engine.

Alternatively you can also jump the two terminals where the DME relay attaches to hot wire the fuel pump. Cant remember which terminals they are but it has been discussed numerous times and a quick search on the forums should find it. This wont require removing the fuel line as you should be able to hear the fuel pump running.

jeanhules

try locking your car and unlocking it. It's only happened to me once, for some reason when I unlocked it from my passenger side door and tried to start it, it didn't turn over. A low tech security system.

jevvy964

Thats where I would start too, DME relays arent cheap and buying one just to find out the old one was fine is ballache.

The other suggestion about lock/unlock is also worth a bash.

Where is the car in the UK?

onceover

Doesn't hurt to have a back-up DME relay regardless of whether thats the problem or not though

Evil Bunny

Chaps,

Thanks for the info thus far, I had already picked up a DME so will try that and the lock unlock before going after the spark.

in regards to placing a jumper across the DME terminals to confirm fuel pump, is this at the fuse box? Does anyone know the terminal numbers?

Jevvy, the car is in Middlesex, although I live in Berkshire.

kokolyia

eBay and Amazon are good places to find cheaper DME relays. The best option would be to go with a solid state relay from ftech9

No affiliation but a happy customer!

onceover

https://rennlist.com/forums/964-foru...what-pins.html

newsboy

If no fuel and no spark, you should check the flywheel reference sensor.

Richard Curtis

If you do see a spark, the spark should be BLUE. If red, yellow or orange, the coil is bad.

ras62

Sounds like the crank position sensor needs replacing.

Railmaster.

Objection!
If it's not the DME relay, put the new relay in the door pocket until the old one break, then switch relays and carry on driving and thank me for the bright idea to keep a spare DME relay in the car!

Stephen Koch

ras62, think you accidentally resurrected an old thread from 2016. i guessing he no longer needs suggestions on what to investigate.

onceover

I would hope he got it running after 4 years!

I don't understand how people manage to bump threads like this unless they’re searching for a solution to a similar problem...

Railmaster.

Another big mystery are all the people who starts "Help my car don't start!" Threads but never tells us what caused the problem once the car is fixed!

Thank you sooooooo much for that! (Not).