VS Cold Starting
My 1997 VS Series 11 Calais v6 seems to be getting harder to start when cold
I have to crank the engine longer before it fires up
I ran some Moreys Upper Cylinder lube recently and now it seem worse
Do you think the fuel pump is buggered?
Stop looking for the Potholes and sit back and Enjoy the Ride
Donating Member
Probably the battery - if it's over 2 years old it may be due for replacement. A good test is to turn the headlights on when you crank - if it cranks really slow you can be sure the battery has lost some of it's capacity.
NO its nothing to do with the batteryOriginally Posted by hako
It cranks over good
Just seems to take a long time before the engine fires up
Like its not getting enough fuel
OK i hopped in the car and checked to see if the fuel pump runs for 2 seconds before it go to start it
I cant seem to hear the pump run
I can hear the pump run in my VR when i do this
Ok the pump relay works OK
So i think the check valve in the pump is fadookered
Come on all you experts make a comment
my idea is, next tank of fuel, run premium with injector cleaner...if its not getting enough fuel, give the injectors a clean out mate =)
Donating Member
Does it crank for a long time without firing then suddenly catch and run smoothly, or fire intermittently whilst cranking then gradually fire on more cylinders and run?
It cranks for maybe 10 seconds then starts and runs a bit rough, then runs fine
if you turn it off and do it again it fires up straight away
its only a first thing in the morning problem
Donating Member
Me-thinks it's the coolant temp sensor which is not telling your injectors that the engine is cold and need a rich mixture. This may or may not be the CTS as the ECU may misinterpret the info form the CTS but if it was me I would check the operation of the CTS using the Gregorys manual.
The other "maybe" is that the ECU is not telling the fuel pump to run for 2 secs to prime the fuel system...this results in a "no fuel' condition till the oil pressure raises (due cranking) enought to then supply power to the fuel pump.
10 secs to start is not going to do your car any good!!!
Cars cost too much.
Mines a little slow at starting too..
When it does start and you go to rev it it lags a fair bit.
Does yours do that? Sounds the same to mine.
I had similar issues - taking longer than it should to start and had slight dead spots down low
Some reco'd injectors have fixed the problem now starts quick and runs smooth
Please re-read my posts
Hako is dead right.The coolant temp sensor(not the gauge sender) can cause this problem you have described.I would be testing the CTS ,just to make sure its not the problem.
So if the coolant sensor isnt working it wont let the fuel pump run to get the fuel up
The coolant temp sensor tells the ECU to run a richer mixture when cold starting (just like a choke on a carby).If it isnt sending the right info,it can make it hard to start when cold.You said it only does it when first starting of a morning.So its most likely to be temperature related.Ive never seen temperature effect a fuel pump.(unless its been run out of fuel and overheated,which usually kills them). If you think it is your fuel pump then get the fuel pump pressure checked,or replace the pump.
Last edited by Brett_jjj; 28-11-2009 at 08:51 PM.
Cars cost too much.
I wouldnt want to replace the pump just yet... It's a $400 part brand new...
I may have to check my temp sensor too then?
I got a new fuel pump for $ 160 at Bursons.But Id get the pump pressure tested first if it were me before I replaced it. You dont want to change it if its not even the problem.Theres even more reason to get it tested if you're chasing a problem thats hard to track down.
At least you can rule it out then.
Last edited by Brett_jjj; 28-11-2009 at 09:43 PM.
Cars cost too much.
A genuine Holden one is 400 I think..
It's the fuel pump/sender unit.. So yea..
This was just the pump,no sender.I had to remove the old pump from the sender unit and install the new one.
Cars cost too much.
Hmm... So the sender could be fine in mine but you can remove the pump as well? Hmm...
Donating Member
If you are wanting to buy a genuine Holden fuel pump ask for a ACDELCO fuel pump kit which is cheaper than a holden and is the same brand of pump plus you get a couple of gaskets with the kit. The holden one just gives you the pump and strainer. I`ll look for the part number later and post it.
I work for a dealer so I checked the pumps out before I got mine just pulled back the black rubber on the pump what do you know same brand of pump.
"Success is the ability to go from one failure to another with no loss of enthusiasm" Sir Winston Churchill.
My VS II Berlina Wagon
MY12 II SV6 Sportwagon
slideways
$400 for a pump? Are you on drugs?
http://cgi.ebay.com.au/GENUINE-DELPH...item3357db73f8
I bought the same one not that long ago to replace mine. Genuine pump with new gasket and strainer. Exact same pump as I removed from my car, but better working
Cars cost too much.
It was the pump/sender unit together.
slideways
Ah right missed that part. That sounds about right lol mate of mine went to holden for a new sender and I was shocked at the price. Next stop, wreckers.
Cars cost too much.
Ya cant always trust the wreckers senders though. They could be just as faulty as the one you have now...
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