95 850t Starting issues

iruleyounow · Post by **iruleyounow** » 25 Nov 2014, 20:22

Everyday, cold warm or hot, the car takes about 3-5 seconds to start. I feel like I have to hold the key forever just so it starts. It always starts up for me, I just don't understand why it takes so long.

New head gasket, all new tune up parts, new pcv system. New battery and had the alternator/starter checked. Only thing I haven't addressed is the fuel filter. Its not horribly bad but I know it needs changed.

Do these cars usually take that long to turn over?

Any suggestions as to why it always takes so long? I never have to turn the key more than once to start it.

Post by **Ozark Lee** » 25 Nov 2014, 21:08

Any codes from part A-2?

Does the temp gauge read normally?

A couple of things that can cause hard starting are a bad check valve in the fuel pump and, in some circumstances, a dirty IAC valve. Check for codes first. Your car can post error codes even though a CEL isn't triggered.

...Lee

iruleyounow · Post by **iruleyounow** » 25 Nov 2014, 22:34

Ozark Lee wrote:Any codes from part A-2?

Does the temp gauge read normally?

A couple of things that can cause hard starting are a bad check valve in the fuel pump and, in some circumstances, a dirty IAC valve. Check for codes first. Your car can post error codes even though a CEL isn't triggered.

...Lee

No codes stored at all. No CEL. Everything reads normal. I have not cleaned the IAC valve.

Post by **Ozark Lee** » 26 Nov 2014, 00:02

If you have access to a fuel pressure gauge you can read the fuel pressure with the car running and then observe the pressure after the engine is shut off. The system should hold pressure - not full operating pressure but somewhere around 30 PSI for 20 or 30 minutes.

If the pressure quickly falls to zero it would indicate a bad check valve in the fuel pump housing and that will cause hard starting.

...Lee

Post by **rspi** » 26 Nov 2014, 03:49

Is it taking a while to start cranking or does it crank immediately and takes a few seconds to start running?

iruleyounow · Post by **iruleyounow** » 26 Nov 2014, 13:21

rspi wrote:Is it taking a while to start cranking or does it crank immediately and takes a few seconds to start running?

It cranks immediately but just takes about 5 seconds to start. Almost like when you have a weak battery.

iruleyounow · Post by **iruleyounow** » 26 Nov 2014, 13:22

Ozark Lee wrote:If you have access to a fuel pressure gauge you can read the fuel pressure with the car running and then observe the pressure after the engine is shut off. The system should hold pressure - not full operating pressure but somewhere around 30 PSI for 20 or 30 minutes.

If the pressure quickly falls to zero it would indicate a bad check valve in the fuel pump housing and that will cause hard starting.

...Lee

I don't have one but I'm sure I can find one. I know there's two pumps. How would I know which one to change out if that is the issue

Post by **Ozark Lee** » 26 Nov 2014, 19:37

On an 850 (FWD) there is only one pump, it is accessed behind the right hand rear seat. Unfortunately, if that is the problem, you can't just change the insert with a Walbro or another Bosch since the check valve is built into the plastic housing which means an entirely new assembly.

It is actually just a tad easier to change the assembly than it is to install a new pump cartridge in the old housing but it is tougher on the wallet.

...Lee

Post by **rspi** » 27 Nov 2014, 04:01

So, are you saying that cranking is slow at first, then speeds up?