Intermittent starting problem
Discussion
Had a few issues with starting lately its always fine when starting from cold and is okay 90% of the time but every now and then like yesterday when i had just paid for petrol and got back to the car, unlocked ,got in turned key heard the fuel pump prime and engine turns over but willnot start . so wait a bit try again and nothing again so i lock and unlock the car and try again the engine catches but isnt eager to rev or idle at first but i pull away and drive home . Get the car home and turn into garage turn off the car and restart starts okay . This has happened afew times lately had it serviced by main dealer not long ago and recall that the fuel pump terminals where cleaned up by them could the pump itself be on its way out ? any help much appreciated .
Tom .
Tom .
This is a very typical issue on the V8's.
Over time the electrical wires to the starter motor break down and under extreme conditions (read hot) insufficient current arrives at the starter motor to turn the engine.
You need the Modwise "hot start kit" and your problems will be over. Cheap enough and you could fit it yourself.
Over time the electrical wires to the starter motor break down and under extreme conditions (read hot) insufficient current arrives at the starter motor to turn the engine.
You need the Modwise "hot start kit" and your problems will be over. Cheap enough and you could fit it yourself.
coetzeeh said:
This is a very typical issue on the V8's.
Over time the electrical wires to the starter motor break down and under extreme conditions (read hot) insufficient current arrives at the starter motor to turn the engine.
You need the Modwise "hot start kit" and your problems will be over. Cheap enough and you could fit it yourself.
Yes it could well be this but the starter does seem to spin the engine quite freely and when it does start it seems to struggle to rev for a short period . As ive said this is very intermittent . Over time the electrical wires to the starter motor break down and under extreme conditions (read hot) insufficient current arrives at the starter motor to turn the engine.
You need the Modwise "hot start kit" and your problems will be over. Cheap enough and you could fit it yourself.
This sound like the classic Hot Start problem, do a search on this you’ll find loads of info including this post which I’ve made before.
In my opinion it is an issue that manifests itself in two ways. The problem is that the starter solenoid is energised via the immobiliser which when the starter starts to wear a little and then gets hot needs a little bit more current to kick it into action (problem one). Also the immobiliser is not really up to the job of delivering the required current (problem two) and it doesn’t like getting warm. So the first thing to do is fit David Beer’s Mod-wise Hot start kit, which is basically an additional relay in the starter circuit.
I fitted the Mod-wise kit which did help some of the time, though did not sort my problem completely however it does fix the majority of cases. Also once fitted it makes it very straight forward to by-pass the immobiliser should you ever need to (I’ll mail you direct should you need to do this)
The immobiliser apparently has three small circuit board relays, one for the Fuel pump, starter solenoid and ignition circuit. These are not really up to the job and don’t like getting hot, especially the starter one, hence David’s kit. The immobiliser unit is fully potted in and can not be repaired, if one fails completely the unit can be bypassed but not permanently for insurance purposes, to maintain Thatchem CAT 1. If you want to replace the unit talk to Metaman on Piston Heads (Carl from car and bike installations). Carl is the man where the alarm is concerned. Replacement isn’t cheap as the new unit must be synchronized to the rest of your system.
However all is not lost, since mine worked when cold, I assume this is the same for you, the immobiliser unit is not dead yet.
I could get at mine in the Griff by removing the radio and vent ducts, the immobiliser is a black plastic box with a red label having T99 (I think) on it and a lot of all black wires coming from one end, about 2 x 4 inches. It was sat directly on top of the bellhouseing cover and getting fried. The wires are long and all bundled up, if you cut the tie wraps there should be enough wire to move the unit to a cooler location behind the dash. This is what I did and now I only have the occasional problem on very hot days after a short journey. Mine has lasted now for many years, but when it dose fail it just take a quick fiddle with the new starter relay and she bursts back into life, not a problem.
Hope this helps,
Simon.
In my opinion it is an issue that manifests itself in two ways. The problem is that the starter solenoid is energised via the immobiliser which when the starter starts to wear a little and then gets hot needs a little bit more current to kick it into action (problem one). Also the immobiliser is not really up to the job of delivering the required current (problem two) and it doesn’t like getting warm. So the first thing to do is fit David Beer’s Mod-wise Hot start kit, which is basically an additional relay in the starter circuit.
I fitted the Mod-wise kit which did help some of the time, though did not sort my problem completely however it does fix the majority of cases. Also once fitted it makes it very straight forward to by-pass the immobiliser should you ever need to (I’ll mail you direct should you need to do this)
The immobiliser apparently has three small circuit board relays, one for the Fuel pump, starter solenoid and ignition circuit. These are not really up to the job and don’t like getting hot, especially the starter one, hence David’s kit. The immobiliser unit is fully potted in and can not be repaired, if one fails completely the unit can be bypassed but not permanently for insurance purposes, to maintain Thatchem CAT 1. If you want to replace the unit talk to Metaman on Piston Heads (Carl from car and bike installations). Carl is the man where the alarm is concerned. Replacement isn’t cheap as the new unit must be synchronized to the rest of your system.
However all is not lost, since mine worked when cold, I assume this is the same for you, the immobiliser unit is not dead yet.
I could get at mine in the Griff by removing the radio and vent ducts, the immobiliser is a black plastic box with a red label having T99 (I think) on it and a lot of all black wires coming from one end, about 2 x 4 inches. It was sat directly on top of the bellhouseing cover and getting fried. The wires are long and all bundled up, if you cut the tie wraps there should be enough wire to move the unit to a cooler location behind the dash. This is what I did and now I only have the occasional problem on very hot days after a short journey. Mine has lasted now for many years, but when it dose fail it just take a quick fiddle with the new starter relay and she bursts back into life, not a problem.
Hope this helps,
Simon.
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