|
Hi:
My wife's 242Ti has been sitting for several months. I switched it over to Mobil 1 20/50 last year (bad idea I think now) and it quickly cleaned out all the gunk that was holding the 26 year old motor together. The Garrett turbo blew its seals and started smoking quite badly (bearings also got real wobbly). I changed it over to a Mitsu 13C with a newer manifold that I had lying around. Then it had fuel delivery issues. After discovering rust in the tank, having it dipped and recoated, then having my patience tested by various faulty fuel pumps that wouldn't deliver enough pressure, I cleaned the system, changed the FPR/distributor, put in the IPD aftermarket in-tank pump, a new Bosch main, a new sender assembly, and finally got it to run real well. I also switched out the O2 sensor, but it's now on the back of the exhaust manifold where the EGR would be on a later car, rather than in the collector or the downpipe.
Now my problem is in trying to set the mixture. It took a while for it to run without loping or stalling. The plugs were wet, so that was fixed. Then it was smoking blue-grey smoke on idle but it would puff black smoke on bursts of full throttle. I played with the mixture a little and got rid of the blue-grey smoke, but the black smoke remains. I also emptied the intercooler of any oil (there is still some residual from the old turbo in the IC tubes). I'm hoping that will burn off eventually.
But now that I have to make smog -- here's my latest issue. I have an old Sun Dwell/Tach that my dad got in the early 80's. After I've hooked it up to the CI test port (red lead, left front fender), the Dwell stays at about 70 the whole time, no matter what I do. I know about the Bentley errata about pulling the O2 sensor wire, so I'm not doing that.
I read this:
• 68° (64-70) "richened" dwell with ECU pin 7 is grounded by either:
a) Engine temp below 60°F as detected by thermal switch in block
b) "Charge Air" Pressure switch on firewall detecting at least 2.8 psi boost
on this page: http://www.brickboard.com/RWD/volvo/1276434/220/240/260/280/ci_mixture_adjustment.html
The boost gauge (indicates PSI) shows no boost at idle. The engine ran for 20 mins and was nice and warmed up. I did change the pressure switch to the newer style when I intercooled the car (it's an 82 and was not IC'd originally). Could this be my problem with the Dwell reading? How do I solve it (just temporarily unhook it?) I remember that I had to re-terminate the wires on the switch because they did not have the same connectors as the car's wiring harness. Maybe I mixed them up?
I'm exhausted and it's 95 deg outside right now, so I'd rather not go back out in the heat. Any suggestions?
Another issue is that with a brand new VDO sender, my fuel gauge ain't working anymore. I haven't started to troubleshoot it yet, but thoughts on that bit?
It's always something.
Thanks.
|
