Compression #'s

mirage86

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Oct 14, 2004

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Dec 3, 2004

#1

• Dec 3, 2004

• #1

84 302 stock.
Compression #'s are:
1 - 115
2 - 130
3 - 140
4 - 130
5 - 120
6 - 130
7 - 120
8 - 120

Is this about avg. for an old motor with many miles? Could #1 be a culprit to my prob. (Car starts spitting and sputtering at approx 3000 rpm's till ya shift or slow down). Man I am tapped out of ideas. If I had the money I would replace the engine and not bother you all but I've got to make it just a little longer. Thanks

 

hllon4whls

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Dec 3, 2004

#2

• Dec 3, 2004

• #2

The compresion numbers here are ok. Could be a little more even, but overall ok.

This is not going to cause your drivability problems. The worst you will have is a little loss in power as compared to a fresh 302. That does not mean that it will run like a geo metro, just you may be down a few ponies.

 

tomst9

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Bethlehem Pa

Dec 3, 2004

#3

• Dec 3, 2004

• #3

have you checked the plugs, wires, cap rotor...ect
tom

 

hllon4whls

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#4

• Dec 3, 2004

• #4

Check your plugs, wires, and TFI. That should get you moving in the right direction. You also need to check the timing. The TFI module is the box on the side of the dist that the computer wires plug into.

http://forums.stangnet.com/showthread.php?t=513173&highlight=sputter

Did a search on sputtering and I found the abouve info.

 

mirage86

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Oct 14, 2004

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Dec 3, 2004

#5

• Dec 3, 2004

• #5

I've replaced wires, plugs, dist cap, ignition coil, fuel pump, fuel filter,. Checked timing it's at 10btc. Can the tfi module malfunction and cause problems or is it all or none. In the past I've just had them to kill over.

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

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Dec 4, 2004

#6

• Dec 4, 2004

• #6

what codes do you get (sorry if you posted them and i missed it)? i would not overlook a PIP code either.

does the missing problem get worse when the motor is hot?

good luck.

 

Gearbanger 101

Straight Outta Locash

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Aug 10, 2002

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Dec 4, 2004

#7

• Dec 4, 2004

• #7

have you got $250.00, some rebuild experience and a little time? that's all it cost me to put new rings, bearings and gaskets in my old HO.

Not saying it's the source of your problem, but it may just be what the engine needs for a new lease on life.

 

mirage86

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Oct 14, 2004

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Dec 4, 2004

#8

• Dec 4, 2004

• #8

No, the miss is consistant. It's not better or worse at any given point. My car is an 86 that has had a 302 transplant. (I did not do the swap, bought it that way). As far as codes go, I have not seen a terminal for scanner access and would that be correct anyway with engine swap?

 

mirage86

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Oct 14, 2004

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Dec 4, 2004

#9

• Dec 4, 2004

• #9

(Sorry if this posted twice, I got an error)
The miss is consistant. Whether the car is cold or hot. My car is an 86 that has had a 302 transplant (Bought this way). As far as codes, I have not seen a access terminal for a scanner (of course I have not looked either) but with the engine swap, would that still work.

 

HISSIN50

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#10

• Dec 4, 2004

• #10

though im not sure what is up exactly with your ride, IIRC, 86's are SD (like 87-88 non cali cars). test terminal on my 88 is under the hood - driver side. it is below the wiper motor, on the back side of the strut housing.

good luck.