csv

[jimmyjimmy]

i made a start to see if all my cis components are working before installing

the AAR came first and he past the test
then I put 12V on the csv but no click
valve gets warm after a while

so she is clogged inside

I poured some brake cleaner in it and left it for 2 days.
No change...

Is there something else that can be done?

thanks

[Schulisco]

Don't know if it clicks when energized. But be careful - they can get too warm/hot if no fuel flow inside so that the coil can overheat...then it's junk. It gets ground from the TTS sitting on the left chain case cover as long the starter motor is engaged (up to max. 8secs when engine/temp is cold).

Thomas

[boyt911sc]

Originally Posted by jimmyjimmy

i made a start to see if all my cis components are working before installing

the AAR came first and he past the test
then I put 12V on the csv but no click
valve gets warm after a while

so she is clogged inside

I poured some brake cleaner in it and left it for 2 days.
No change...

Is there something else that can be done?

thanks

JJ,

Could you share with us how you tested the CSV aside from applying 12-volts to it? Was the FP running when you applied power? How did you apply 12-volts to the 2-pins? Keep us posted. Thanks.

Tony

[jimmyjimmy]

I took the valve out of the cis .
I connected 2 wires to a JPT connector.
Put the connector on the valve and the other ends of the wires to a 12V batterie.
that s about it

[MBAtarga]

CSV - Cold Start Valve

[PeteKz]

You will need fuel pressure to see it it works. Hook it up to the hose and its electrical connector. Leave it out of its socket in the intake so you can see if it squirts. Disconnect the CDI so that the engine will not start, then turn the ignition key on and verify the fuel pump is running. Then turn it to start and see if you get fuel squirting out for a few seconds.

[boyt911sc]

Originally Posted by jimmyjimmy

I took the valve out of the cis .
I connected 2 wires to a JPT connector.
Put the connector on the valve and the other ends of the wires to a 12V batterie.
that s about it

JJ,

You got the right idea how to test a CSV but it is incomplete. Applying 12-volts to the CSV is half of the test and you need fuel supply from the FP to complete the test. A good working CSV needs a TTS to operate during a cold start condition. I test the CSV and TTS independently from each other.

Don’t worry about energizing the CSV for extended time during your test, it could withstand the test. It would be too much trouble for you to fabricate an extension wire harness and extension fuel line for the CSV test unless you do it as often as I do. You are on the right track and doing fine.

Tony

[jimmyjimmy]

thanks, so in fact I can only do the test with the cis in the car

however I saw on you tybe a guy putting 12V to it and squirting brake cleaner from a canister in it and you could see it squirting

[PeteKz]

I forgot that you still had the CIS off the engine.

The main point is that the CSV is an injector, and it has to have pressure (fuel, carb cleaner, whatever) to see if it squirts and doesn't have a bad pattern. Try the can of carb cleaner. You'll need three hands to do it though.
Or rig up some kind of holder.

[JSV798]

Originally Posted by jimmyjimmy

i made a start to see if all my cis components are working before installing


then I put 12V on the csv but no click

So you have managed to remove the CSV with the engine in the car? Any tips on how you did this as I need to test the CSV on my car (1978SC).

Roy

[E Sully]

You can test with them out of the car. The fact that it gets warm might indicate the internal coil is still good. I would have to say your injector may be stuck internally. Take a reading with an ohm meter.
I have 4 CIS CSV's. 3 for my '73.5, and 1 later. 3 of 4 click with 12v applied. 1 gives a light arc with 12v, but is stuck internally. All 4 have about 3.2 ohm resistance reading.
I had a similar issue with 2 injectors on a used '86 3.2 I rebuilt. It took me quite a few days of brake clean, pulsing them with 12v, and a bit of tapping with a rubber screwdriver handle till they freed up and starting clicking. The car ran great when I was done, and the freed up injectors worked fine.
This video shows one guys method
https://youtu.be/rUUgR94drxg?si=RfX7gV-VeORmNYSC

[jimmyjimmy]

no sorry, cis is out of the car

[jimmyjimmy]

i have 4.2 ohms reading and also a little arc with 12V

if i pour some brake cleaner in it will it reach the parts that are clogged?

allready tried it but no result , it also evaporates quickly ,even when shut off.

[JSV798]

Originally Posted by E Sully

You can test with them out of the car.
This video shows one guys method
https://youtu.be/rUUgR94drxg?si=RfX7gV-VeORmNYSC

I've done something like this on injectors for a 1973 Volvo 1800ES (they needed only 3 volts; any more would have burnt them out but think 12v is OK on CIS). Hardest part is making a connector from carb cleaner aerosol to injector. I used a series of increasingly sized tubes. Once connected you need to press on the carb cleaner button and then apply voltage. It's not obvious but the guy in the video is holding down the button on the carb cleaner with the palm of his hand and then making electrical contact. Are you doing this?


Roy

[jimmyjimmy]

no,

gonna try to make an injector as in the video

this thing costs 450 e here in Europe unbelievable

thanks Roy

[boyt911sc]

Originally Posted by jimmyjimmy

no,

gonna try to make an injector as in the video

this thing costs 450 e here in Europe unbelievable

thanks Roy

JimmyJimmy,

Do you need a good working CSV? PM me your shipping address and I will check the cost of postage. There is enough good CSV that I would ever need. The original CSV in my ‘78 SC is still working after 45 years.

BTW, where are you located? I will be in Amsterdam by end of March 2024 and that’s about 7 weeks from today.





Tony

[sunlion]

Hey Tony …… l’ll take a good CSV when you get back. Someone above asked how to remove the CSV with the motor intact. In my friends ‘78, we removed the engine mount bolts with a lift table under the motor then lowered the motor a few inches. There’s a lot of bracketing and smog stuff on the drivers side of the motor that need to be removed. Long arms and a step
stool once the car in lifted up a couple feet. I’ve got a scissor lift. Check all contact points at the TTV, CSV and starter. Found broken wires which leads me to think the CSV stops working because of broken wires then gets gummed up from varnish, corrosion etc due to lack of use. Best, Ravi.

[E Sully]

I did a little work on the sticking CSV mentioned previously. I put some WD40 in and let it soak, with occasional lightly rapping it and adding a little more WD40. Today I took the stuck injector and gave it a series of 12v and lightly tapping it. It freed up and now seems to be working again.
I found there are filters inside the fuel hose neck on them. It took a little while to get them out without damage. You can see the reddish residue from old gas on the filter and inside the neck of the CSV.
I used a windshield chip repair syringe and some tubing to connect to the valves inlet. I put pressure on it, applied 12v, and then the air hissed out, so they do flow a bit. After some cleaning and flushing they should be good.

[boyt911sc]

Originally Posted by sunlion

Hey Tony …… l’ll take a good CSV when you get back. Someone above asked how to remove the CSV with the motor intact. In my friends ‘78, we removed the engine mount bolts with a lift table under the motor then lowered the motor a few inches. There’s a lot of bracketing and smog stuff on the drivers side of the motor that need to be removed. Long arms and a step
stool once the car in lifted up a couple feet. I’ve got a scissor lift. Check all contact points at the TTV, CSV and starter. Found broken wires which leads me to think the CSV stops working because of broken wires then gets gummed up from varnish, corrosion etc due to lack of use. Best, Ravi.

Ravi,

I will be in Amsterdam in early April 2024 for my travel abroad. If you still need a good working CSV, I could mail one to you when I get to Europe 3 weeks from today. I will need your shipping address. PM me your information including your email.

Tony