Quote:
Originally Posted by apbtpetey
i think will have a better understanding of things once we do some tests. Elemental if you dont mind i might give you a call as we test it for some input from you.
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Shoot no I dont mind call away. Still have my Number?
For whats its worth, Here is my drivabilty diag proceedure.
First, I confirm the firing order before even starting the car, also visually look at the air fitler and plumbing.
If they check out, I hook up a vaccum gauge,fuel pressure and a Timing light.
Start the car and get it to operating temperature.
Use the timing light and confirm engien timing at Idle, and rev up to about 3,000 making sure the timing advances, and goes back when it goes to idle.
If it does... Great, Timing test. 1 down 5 to go.
Using the vaccum gauge, Give it a couple of snap throttle actions, and hold it at 3,000 and observe the gauge. Have the printed link I sent about vacuum gage readings handy. If I see what I should. Bam, Great. Air Test done 2 down 3 to go.
Check your fuel pressure guage while running, make sure it is in spec.. Runnuing at idle and during a throttle snap test.
Shut the engine down and pull out the plugs, I like all at once, but to each their own. One at a time is ok.
Check the plugs. If they are not OE for that brand of engine, get a set of the OE ones. If they are Worn, get a set of OE plugs.
With the wire off, hook up your fake spark plug you can observe the spark qaulity while cranking. Screw in yoru compression Gauge.
Ask a assistant to crank the engine, while you observe spark qaulity. If its fat and blue...Spark is good. 3 tests done, 2 to go.
Check the compression gauge after cranking. Write down the number. Install old/Replacement spark plug. Repeat for all cylinders.
Compare all compression numbers. The actual number isnt as importmant as the spread. The lowest and the highest number should not be over 10% difference. If that ok. Great Compression down. 4 out of 5 done.
Finally, turn the car to II, so the fuel engages (II is when all the dash bulbs illuminate, but the engine is not running)
Oberserve the fuel pressure gauge for bleeddown.
Finally, all 5 tests done.
If you do ALL 5 of these tests, in the order I presented, You WILL know what the problem is. It is also, the most time effective way I came up with to perform these tests. It would take me less thena hour to do all of this on ROvers.
I STRONGLY recommend doing all the test for a big picture of what is happening.
Lets adress overheating after these tests. It may be realted, Maybe not... If it even IS overheating. Haas then been verified indepentant of the dash instrument?
Al at DAP... Dont get me going on him.
