Tassie6er
I've got a B21E that tends to bog down under load and is carrying on a bit. It's done 500,000 k's and been regularly serviced- so there is a bit of blow back and I suspect it is just tired. I removed the fame trap and that gave it a bit more - I suspect it is fowling up with oil through the breather hoses and realised it is probably time to fling in a new engine, but in the meantime, I'd like to get to the bottom of this.
Kind regards,
Becher
jamesinc
Well a new flame trap would be a good start, clear out any other blockages. Next I'd run seafoam or intake cleaner through the engine to clear out any carbon build up.
After that a compression test would be in order I suppose.
Tassie6er
James, sage like wisdom. I'm also going to pressure test the fuel injection. Thanks again. Becher
carnut1100
I should catch up soon to check out the new beastie!
familyman
What James said. But also, how long since air filter was changed? Try it (very temporarily) without the air filter. The last time my B21 was acting before going to scrap, the bottom 15-20% of the air filter was oiled up and removing it allowed the car to start (it was struggling to before that) and run (wouldn't continue running before that).
Tassie6er
Familyman - the more I think of it, the more I'm going to give that a try!
familyman
Again, don't do it for long. If you need to drive it somewhere to get it to act up, think about unclipping the back half, remove filter, and pinching some flyscreen mesh between the two halves. Just in case it sucks something in.
familyman
It's just a test obviously... It was pretty obvious on mine due to the oil, but I didn't know when that one had last been changed. And that car was heading to scrap so I didn't care much. So if it's a car you're keeping and you don't know, assume it needs one anyway. Be careful of that accordion tube connected between the back of the air filter housing and inlet too. It's very easy to split it.
Angus242164
Pull the plugs and see if they're oil fouled.
Does the coolant have oil in it, or smell like fuel?
Do a compression test.
If the compression is low, you can do a leakdown test to determine where the pressure loss is occurring, but it sounds like there's a good chance it's going past the rings in this case.
Tassie6er
Angus,
Thanks - all good tips and will do. The last time I did a leak down test on it, I managed to blow the heater radiator - boy that was a kodak moment....!!!
Anthony
Vacuum advance canister on ign distributor - check by sucking hard
Canoe
...if the volvo becomes a pig,make ham.
Tassie6er
@Canoe - when in rome...
Tassie6er
So just to update everybody. I've done a compression check and it is not that bad - rang of 130 to 150, there isn't too much blow back, however generally the motor was gummed up, so I've cleaned most of the intake system and taken it for a good run and now it is running fine. I'll use some seafoam on it next weekend, but thanks to everybody for their support and ideas.
Vee_Que
130 to 150 is not, you need all cylinders to be even within 5psi and a turbo motor minimum is 130psi.
Angus242164
I've seen plenty of healthy engines of various types with more than a 5psi variation, a 20psi variation is getting on the large side, there is probably some wear there, but if it's now running fine then you must have had some sort of external issue.