smog fail

[fixkick]

OK fixKik
I ran all the EGR tests you suggested , and every thing seems to be ok.
The only "RED FLAG" is , I get "code 51" when I jump terminal "c" to "b" on the monitor coupler,
BUT the CEL does not come on when the engine is running ,only before starting.
You ask if my intake is a "quad port". I see four individual intake runners (one for each cylinder) if that is what you mean?
You asked about the cooling fan , it is electric and when the temp gage goes up over its normal position , i turn the the fan on.

Thanks again !!

pull the dome fuse. at left knee, fuse box. wait 5min put back
all errors are erased in the ecu. code 51 means EGR is failing. (but we knew that, and so does your ECU)
so the EGR main, valve opens when engine is hot. and throttle is gunned, hard,
this means 1 to 4 of the EGR injectors are clogged. (common as nails) The EGR main opens , regardless if there is full flow or not. (its just vacuum operated)

see the first 4photo frames here, there are 4 intake, ports, 4 fuel injectors and 4 egr injectors. a quad Intake it is for EGR, (in latter 1995 became 1 port , the mono port)
http://www.fixkick.com/sensors/EGR/90-95...index.html
for every port clogged, that port expels huge NOX gasses, more than and any CAT can control (to federal spec)
this intake needs service.

the quad port , has paths like this.


not fun to clean at all.




if you look here, on the right see 4 plugs.
those block off what are called drillings. (drilled day one in the aluminum foundry)
ive removed the plugs and cleaned the paths, then used short screws to seal it back. (there are many artistic way to clean this and make plugs)

the 4 EGR PORT injector drillings at the actual ports can be rod'ed out with wire, too. to get them cleaned out and free flowing.
one or more are clogged, my guess all 4.
as is usually the case.

good luck, to you.
cheers,