M

marcustitanic

New Member

• Feb 27, 2012

• #1

p38 wont start
my p38 is dead had a new batt worked ok for 2 weeks came to start it ignition lights on clicking on relay but no joy
so many friends vave given surgestions like switch harness on gear selec or ecu or key lockout and the latest crankshaft possition sensor and i dont like the look at getting to that or the price of a new one any surgestions please
it a 4.6 1996
it went to halfords who checked batt and alt and came up with batt
just dont whant to spend money on something that dont need replacing
some body said its prob something stupid ive missed

 

Last edited: Feb 27, 2012

jt_armstrong

Well-Known Member

• Feb 27, 2012

• #2

From the sounds of it you battery is flat. Do you own or have access to volt metre? Measure the voltage across the battery. You should get a reading close to 13v. If it is closer or lower than 12v then it needs charging (at least). Put it on a charger and let it build a good charge. If it starts after that build the revs up to 2000rpm and measure the voltage again. It should closer to 14v. If not you alternator is not charging. If it is then you may have some circuitry draining your battery. Common cause is the RF receiever.

 

Datatek

Well-Known Member

• Feb 27, 2012

• #3

To be a little more precise, a fully charged battery should read 12.8 volts 30 minutes after charging stops. 12.2 volts or lower is pretty much a flat battery. Charging should be 14.2 to 14.8volts at 2000rpm.
Either your new battery is faulty, quite common these days, or something is draining it, usually this is a faulty RF receiver keeping the BECM awake.

 

M

marcustitanic

New Member

• Feb 27, 2012

• #4

interesting ive just put my metre on batt showing 11.7v
im now gona charge my old batt up overnight and check in moarning
i realy hope its such a simple job and will be returning batt to halfords

 

wammers

No longer with us, RIP

Donater

• Feb 27, 2012

• #5

marcustitanic said:

interesting ive just put my metre on batt showing 11.7v
im now gona charge my old batt up overnight and check in moarning
i realy hope its such a simple job and will be returning batt to halfords

Click to expand...

They are not know throughout the trade as Halfrauds for nothing.

 

jt_armstrong

Well-Known Member

• Feb 27, 2012

• #6

If it turns out to be the battery don't assume that charging it or even replacing it will cure your problems. Something caused the battery to go flat and you need to establish what that was fingers crossed it is your driving profile (lots of short trips). Alternator's and RF receivers cost a bit more than a 30 min drive once a week.

 

stevef1964

Active Member

• Feb 27, 2012

• #7

P38 won't turn over.

Have you tried tickling it's tummy?

 

Saint.V8

Dyed-in-the-wool 100% RR Junkie

Full Member

• Feb 27, 2012

• #8

stevef1964 said:

P38 won't turn over.

Have you tried tickling it's tummy?

Click to expand...

:hysterically_laughi

 

M

marcustitanic

New Member

• Feb 27, 2012

• #9

thats it short trips of less than 6 miles at night :crazy_driver::