Just a quickie here as the grandchildren have taken over our lives today. Earlier this morning one of the neighbours rocked up on the doorstep wondering if i could get his cat started for him. He's a bit of an unpopular chap in our street so i did think twice about it but in the end I thought "don't be such a miserable so and so Jock, just get him going. Turns out the car is one of the new Twingos - so engine in the back and who knows where the battery is. Tried cranking it but all that happened was the "click of depression" - Ok, probably battery is flat, wish I'd bought that battery tester I've been going on about in recent weeks. Then I noticed there was an electric tyre inflator pump by the rear wheel. Oh, says he, it was flat and I was trying to blow it up but the pump has now stopped working too. So he's flattened the battery completely trying to blow up the tyre? When did you last run the car? Oh, probably about a month ago was the answer. Oh dear, this could be a lost cause?
Ok, so where's the battery. Let's look under the bonnet first - being rear engine'd I wouldn't be surprised to find it's under a back seat but checking under the bonnet should be quick and easy - But no - he's never had the bonnet open! Really? well, not easy to open but eventually we got there. A wee secret panel pulls out of the grill on the N/S revealing a lock which the ignition key fits. Turn the key clockwise and it feels as if something is being released, but not the bonnet. A few minutes later, having pulled forward two levers - one on each side, the bonnet is released. However it's just a flimsy plastic body panel, not hinged at all, which comes free of the car but is stopped from falling on the ground by a fabric strap - Never seen anything so cheap and nasty. Now I can see that there's absolutely no storage space in here at all, which explains why he's never been in here before, there's just no reason why you would. Or hang on, is that liquid reservoirs I see? Ignore them Jock, that's not why we're in here. So there's the battery with a negative post mounted battery sensor and EFB on top of the battery. Ok Jock slave battery and connecting to the positive terminal and body earth on the vehicle to avoid "annoying" the ECU controlling charging.
Back over to my house then and to collect my big 75Ah (ex Cordoba TDI) jump battery and leads when I see Becky's old battery just inside the garage door. I gave it a day on the Ctek on "Recond" just as an experiment to see if it would give it a useful boost, wonder if it would do the job, the Twingo can't have a very big engine can it? So connected it up pos to pos and neg to chassis on the Twingo and let them "get acquainted" for a few minutes. Hit the starter key and she burst into life almost immediately although she didn't crank all that enthusiastically. Let them run together for about 5 minutes before disconnecting the slave and all seems well, no check engine light and multimeter showing 14.2 volts on the Twingo's battery terminals.
Maybe Becky's old battery isn't quite as knackered as I'd thought - If you remember I changed it because her clock kept reseting and open circuit voltage was hovering around the low 12 volts area. Or maybe the Recond setting on the ctek actually works? I really must buy that battery tester and run a test on it.
There's a slightly alarming postscript to this tale. Having got it started he told me that he'd not finished pumping up that rear tyre and, as the pump didn't seem to now be working could I do it for him (he's a computer type office based person) Well, now the battery is charging the pump should work I suggested so we coupled it up and looked at the digital display. Nothing, just a blue backlight. So I got my pencil type (PCL) pressure gauge and the cylinder nearly launched itself into orbit when I pressed it onto the valve. The max reading is 5 bar and the cylinder was completely against it's limit stops. I let quite a bit of air out but it still hit the stop! after another "blood letting" it finally came down to around 4 bar and I was then able to set it to the correct 3 bar he wanted. I think he was lucky not to have exploded the tyre and I think the guage on the machine was ruined by the extreme over pressuring? Full marks to the pump manufacturer though, who'd have guessed one of these cheap inflators could hit pressures like this?