Thanks to all who gave good info on my other post - same topic.

Went this AM - the mechanic pulled the fuel rail - swapped out #1 & #4 injectors. Same thing - #4 missing at idle. Tried a spare plug wire to that plug - nothing new.

Mechanic suggested a local Texaco lube spot that does a top end clean - under pressure. So I am there - watching the guy pour two cans of cleaner into the cylinder that feeds it - insert the spray head under the boot - shooting straight into the throttle body. He puts an extra can in the tank - then runs it at 1500 rpm for about 30 minutes. It does seem to be a bit different - but still a definite miss at idle.

So my quest continues. My thoughts are to go like this for a spell - and maybe give a good fast hard workout on the freeway (been driving way too easy lately trying to save fuel). If nothing changes (or I discover nothing new) - then on down the road I will probably pull the head and check the valves. Is there a way to check the compression rings at the same time - I wonder?

Before I do this - I will find a good Volvo shop and get a proper compression test done.

One good thing about all this today is that neither place charged me a dime. The top end clean was to be 79.95 - but he just wrote it off.
--
'94 940T (160K) , '92 745T (200K+)