Installed New Cam, CAR WONT Start/no Compression? - Hot Rod Forum : Hotrodders Bulletin Board
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Old 10-26-2003, 06:22 PM
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Installed New Cam, CAR WONT Start/no Compression?

MAJOR HELPED NEEDED HERE::
I just installed a 292H-10 Comp Cam in my 302. (cc-221837), i put new Flat tappet Hydrualic lifters. (is that even the lifters that it takes?? )
-Before I installed the cam i checked out the lobes on it compared to my old Crane Cam 284 H-12. The first lobe looked similar but the other lobes were completely different postions. not even near what one might say due to longer duration or bigger lift.

Anyways i figured it was because the firing orders on the cam was different? This was answered when i tried adjusting the Rockers to the 1-5-4-2-6-3-7-8 firing order, the valves seemed to open to the firing order of 1-3-7-2-6-5-4-8. so I adjusted them in the 1-3-7-2.... fashion AND put the wires in that manner as well.

Well i got done and started to crank the engine and istead of the gasoline going into the cylinders it seemed to be gushing upwards and out of the carb. It also seemed to be cranking without compression, almost as if i forgot to put in the spark plugs but i know i did that about 2 times, and double checked. We set aligned the marks on the cam and cranks gears. so the timing on there is correct.

WHAT is wrong with my engine. i really need help here..anyone!!??? could the cam be not the one that i could use in my 302? or ????

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Old 10-26-2003, 07:08 PM
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Small block Fords had two different firing orders for their cams. Both are interchangeable. Look at your cam card, it will tell you the correct one. Adjust your intake valve when the exhaust valve is just begining to open. Adjust your exhaust valve when your intake has opened as is halfway closed. It doesn't matter what order you adjust each cylinder. Don't do it any other way. That 90o way is ridiculous.

The carb is flooding. Check your needle and seats. You have the right cam.
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Old 10-26-2003, 07:12 PM
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I think I know what your problem may be!

The EXACT same thing happened to me when I installed the cam in my 305 chevy, cranked way too fast, sounded like it wasn't even compressing, gas coming up through the carb etc.

Turns out I had the rockers adjusted too tightly, and the valves were open all the time... dumb move on my part, but I figured it out pretty quickly.

Check your rockers!

E
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Old 10-27-2003, 07:15 AM
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i will try to redo the rockers any other suggestions?? car is breaking in new cam and lifters??
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1987 GT:
302HO converted non-computer with, no A/C, no Smog Pump ,Twisted Wedge Heads w/ TF RR's, CompCam XE268H ,LongTubeHeaders W/ 2 1/2" Dr.Gas X-Pipe ,2Chamber Flowmasters, Summit Radiator 31*19, 3.73's , ASP UnderDrives, Edelbrock RPM Performer, Holley 670 Avenger Carb, CraneCams Fireball HI-6 , Dual Electric 30" across Fans, LakeWood 70/30's 50/50's, Black Leather seats , Chrome Ponies, 2kCobra R Cowl Hood , Cobra Bumper Cobra Wing, Red on black Interior
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Old 10-27-2003, 07:52 AM
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wont start

are you sure you have your camshaft timed correctly to the crank?
that is another possibility. Unless you changed them over, you should have positive stop rocker arms mounted on pedistals . In which case, you shouldnt have a problem with too tight a lash on your valves, in fact it could be way loose, as your current cam has a smaller base circle than a production cam.
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