hey everybody, i have a 1994 Saturn SC2 5-speed with 237000 miles, i love this car, it takes so much abuse (accidental and intentional) but i have a few problems with it- 1st/ egr passage from head is clogged- how do i clean it up? 2nd/ map sensor pressure too low- how do i get it up there again? 3rd/ quad driver malfunction trouble code- whats that mean? 4th/ code 53- electronic spark control over maximum voltage/value- how do i fix that. I have checked the plugs and they are fine, replaced ect sensors, radiator, water pump, coils, plugs and wires, map sensor, egr and cooling fan so i know none of these things is the problem. I also did a compression thes and i got the following readings- cylinder 1=230psi, 2=220psi, 3=230psi, 4=240psi. that sounds high to me, can anyone let me know if its normal? any help will be appreciated, to see my car, you can go to www.cardomain.com/id/bomexsaturn. thanks again, tony

yeah 200+ psi is quite high...were those the first puffs or the last puffs? either way they are kind of high...u have lots of carbon build up...

1. remove EGR, clean with carb and choke cleaner, then reinstall EGR with new gasket.

2.did you get a code or the MAP or what?

for codes - http://www.differentracing.com/tech_articles/dtc_chart.html

there is no 53 code, there is a 43 code and a flag 53 - both relate to the knock sensor.

was the compression test wet or dry? otherwise try a top engine clean.