'95 Ski GT-40 question

Ok cool, thanks Mike.

Hi Mike,

So, it sounds like general tune-up was the final answer?

Just curious, so I can add the fix to the GT40 Thread

phatsat67 wrote: All you guys with your fancy fuel injected motors.

Just more things to break!

gun-driver wrote: mdvalant wrote: It's our team boat so it'll be pulling quite a few footers every now and then and I would LOVE to see 48-49.! I also have the GT - 40 P heads and a CR camshaft that may help a little.

that info may have been a little more pertinent earlier in the thread...I'm not sayin just saying..    

So, Max RPM in the GT40 manual states 4800...



New plugs and new fuel filter installed...I'm running about 4750 with the ACME1442 now at 44mph

It's still not "right" to my standards...feels weird up there but maybe that's just how it is

I never noticed one on mine either,I'll have to look but because my engine is bacerds its not as easy to see in there.

I see the filter in your picture. You have one - Gun-Driver
.

I find the part somewhat odd. The vacuum from the engine would suck air from the map sensor not push it so what the heck is a fuel filter need for. Maybe they put it in for some rare case where the engine backfires and blows gas into the vacuum tube and it would make it all the way to the map sensor and kill it. Under normal conditions the vacuum would be pulling on the map sensor so all you are doing is filtering the sucking from the map sensor to the upper intake manifold. The part also has an arrow on it telling direction but by playing with the part in my tool box I don't see much of a difference.

That is the vacuum line for the MAP sensor.

Mike
I have no idea what that is see if you can track it to the ends and maybe we can figure out what it's for.

Thanks Paul!!! That helps a ton.   Just what I needed!

I also found this (with windshield washer hoses on it apparently)




Edit: Ok, I quit, can't get my pics to link anymore   

Should be between the tank and the low pressure pump along the left main stringer.
You can see where mine is in the bottom left of the picture.

I buy the low price ATF at walmart, it is around $9.00 for a gallon, makes cheap injector cleaner. I do not think it would help a carburetor. I have been told that the Ford ATF has more lubricants in it than the GM ATF but most sold now says it is compatible with both.

Thanks for the kind words about the color, we are happy with it. The trailer looks good and tows well but it did a lousy job of keeping the boat on the trailer in an accident last year, posted on here last August, since repaired and upgraded for safety.

The 224 I purchased from Tim and I have been happy with it. It does not give any noise at idle and is quiet at wakeboard speeds compared to the OJ 3 and 4 blades I have, and it outperforming the OJ's at low and high speed. I would like to play with other props but the cost makes me happy with what I have so Thanks to TIm, TRBENJ for good advice on this prop.
Once last summer with one person aboard, premium fuel and a garmin GPS and smooth water with the Bimini top down it ran a touch over 50 mph at 5,200-5,300 RPM.   Normally is does not pull that high but that day it was good.

In the early 90's I ran into many Fuel Injection issues, one of the products my company owned was Carter and at that time we had injectors and fuel pumps we manufactured and sold. I called on literally thousands of shops.   Some Fuel Injection cleaners caused more problems than they solved in those early years. I am sure they are better now but I never saw an issue with ATF.   Most of the Diesel guys ran ATF as a fuel injector lubricant. Not with every tank but occasionally they would drop in ATF for the lubrication and cleaning of Fuel Injectors. To date I have never heard a complaint related to it's use.   If your vehicle had a Catalytic converter I would cut back to 1/2 QT rather than a full quart.. On a boat I would add the ATF after putting in the fuel and drive it around to mix it up and than forget about it and let it do its job.
Since hearing this in the 90's I have used it many times in all my vehicles that are fuel injected and shared it with many shops and friends when they had rough idle issues.
It works very well.   Marvel may work equally well or better but I have no experience with Marvel.   I did add Marvel to my oil in my Diesel when I was in extremely cold area's, -7 with a 30 mile headwind made cold starts near impossible for a guy not used to that. The Marvel helped a lot, it helped the engine oil not thicken as much and the engine turned over much faster on the cold start.   I have heard that Marvel is a very highly refined Oil, I have not heard it has cleaning additives.

I've heard of guys running ATF and Jet-A in diesels for clean up but not in gassers doesn't mean it can't be done just never heard of it till now.
As for the GT -40 I run the 1442 runs 48 - 49 and will spin it up to 5200 and I'll run It there for a long time getting down the lake. Won't hurt a healthy 351