Low cold control Pressure

[heliolps2]

My car starts up just fine, I have the CIS test gauges hooked , and CCP and WCP are way down , is it because of the ambient temp, the question is does the temp effect all the CP's for an example my CCP was at 0.6 bar and WCP at 3.0 bar ambient temp was at 40F, SP at 6.3bar, CO at 3% that's 13.5 AFR

Factory specs

2.2 CCP
3.65+-.2 WCP
2.90+-.2 BCP
6.2 to 6.7 SP

[john walker's workshop]

warm system pressure should be in the 4.8 to 5.2 range.

[T77911S]

check the heating element on the WUR. resistance should be around 30 ohms. aslo check for 12v to the WUR.
check to see if you have the thermo time valve (TTV). it should also have 12v. if it is bad, and you have the vacuum controlled WUR, it will keep the CP's low. (just follow the vac lines from the WUR, the TTV is a small disk with 2 vac lines and an electrical plug).

[Bob Kontak]

Originally Posted by heliolps2

CCP and WCP are way down.............

CCP is a function of ambient temperature providing the WUR is close to that temp. WCP is not a function of ambient temp. Here is the factory graph of CCP with some lines I extended that show CCP at 4.4C which is 40F. THE CCP you read is ok per the graph unless I am not reading the graph correctly, which could be the case.

Also, your factory specs do not agree with my factory specs. My specs say your 3.0 bar WCP is just fine.

PM me your e-mail and I will send you the two pages from the manual for the 76.

[T77911S]

you have to be carreful when looking up pressures for 76-79. the books may list a pressure with and/or without vacuum, its about .8 bar between the two.

the 045 WUR can be as low 2.7 without vacuum, and can be as high as 3.6 with it.

he needs to check his vacuum circuit.

[Bob Kontak]

Agreed. The pressure I quoted was testing at atmospheric pressure. 2.7-3.1.

I will just post the page from the factory manual.

[T77911S]

now if you will keep posting pages, i will eventually have the entire manual!

[Bob Kontak]

I think I have posted four or five pages in total over three years so hang with me.

[heliolps2]

thanks guys , I have 112 WUR , the temp here in VA has been about 40 deg F thats about 10 deg C , How low is the CCP suppose to be at ? and how much vacuum do I use to test the enrichment part of it ?

[Bob Kontak]

Originally Posted by heliolps2

the temp here in VA has been about 40 deg F thats about 10 deg C ,

No, it's 4.4 C. Do you even read the posts in you own thread?

[Bob Kontak]

That is a Euro 930 WUR.

Here is what you need. I think your CCP is ok.

It does say the system pressure in the 930 is pushing 100 lbs.

Cold control pressure graph?