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I think the master cylinder is leaking. I am planing on replacing the master cylinder. But in doing so reading on this site, I see where lots of guys have converted to vacuum, and I was wondering about pros and cons. I think I will stay with the hydro boost and keep car stock.

I need a new brake master cylinder. Brake peddle will slowly go to floor and then brake light will come on. Any recommendations on vender? I have been reading about coverting to vacuum brakes. Any thoughts? Pros and con? My car is 84 gn stock. I plan to keep it stock.

84 GN, original. When I set the cruise control it will hold the speed but is does is with losts of throttle movement. I can feel the car surge, then let off, then surge again. The vac gauage needle fluctuates about 10 lbs. the ride is very jerkyt. It acts like the system is set to sensitive...

This is probably a dumb question from a new guy to the GN community. Are the intercooled cars faster than the HA cars? and if so how much? To go faster would be cheaper to just buy an 86 or 87 turbo car?

This is a great thread. I am also new to the GN world. I have a stock 84 GN with 127,000 miles. The car drips cool and I really enjoy it. I don't want to get real radical, but I would like to increase the performance. What is the biggest bang the bucks? I hate to appear ignorant, but what...

I would like to get a sample. I need a couple of yards. Can you give me contact information?

Your engine really looks nice. What did you do to dress it up? Can you send picture of entire engine area? I am impressed.

1984 stock gn. I was getting intermitten check engine lite. Malfunction said EGR. Other reading at idle. closed loop. thermo 174 knock sensor 235, then later 0, then later 9. Mass Air flow 6 gr/sec O2 at idle bouncing all over the place. 712, 246, 629, 242, 514, 1174

What mods have you done to your car? "Best of 114 mph in hot air trim" is fantastic. I am impressed. I recently purchased a 84 GN with 125,000 miles, stock, clean, but not fast. I was really expecting it to be faster. Mine would be doing good to run 90 mph in the 1/4. I expect that there...

Does anyone know of a source for the Lear-Seigler fabric used on 84 GN? This question has probably been asked many times in the past and I am new to this web site and the GN world. Is the fabric available?

Thanks Brad. Where can I find information on how the waste gate works, opens closes, vacuum etc? Since vacum is dumped when the throttle is opened, is the waste gate vacuum servo spring loaded to the open position and then vacuum pulls it closed until the throttle is opened and the vacuum is...

The rod is not threded, does not have adjustment nut.

1984 hot air. The waste gate lever when disconnected has a travel of approx 90 degrees. However the when conneted the vacum actuator, I can only get the vacum actuator to move the gate only about 45 degrees. How much should the wast gate open? How far should the vacum actuator move the...

Fast idle at 1700 rpm. Scan tool says coolant temp 72 degrees-temp gauge says 150 to 160. I suspect that I have a bad temp sensor, am I on the right track? I don't find an IAC on the scan tool, it does have a Idle Air Mtr Pos that reads "175 steps". Loop status is "open". Throttle sensor...

What can the idle rpm to increase?

Thanks Brad! Another question. Do I need the 160 thermostat, or should I stick with factory? Can the cooler thermostat cause the fast idle?

Where is the idle adjustment? I recently installed a 160 thermostat and now the idle is fast. Unless I am putting my foot into it and repeatedly into boost the temp is at 160 or less, particulaly when the outside temp is cool. This is according to the temp guage. I wonder if the ecm thinks...

What is "Dino" and "ZDDP"? Yes I am new to this site and new to the GN world. This is great site.

What is the best engine oil for hot air cars? 10w30 is recommend in owners manuel. What about synthetic? My car is stock with 126,000 miles-runs strong and does not smoke.

1984. Where is the detenation sensor (knock sensor)? Where is good source of wires and connectors for old GN?