350 has no power


Asked by Aug 23, 2016 at 02:42 PM about the 1974 Chevrolet C/K 20

Question type: Maintenance & Repair

I have a 1974 chevy c20 with a 350. The
truck starts great, revs great, even goes
down the road great with no miss. Problem
is its got no power, even going up a
moderate hill you have to floor it and still
loose speed. Its got new plugs, new plug
wires, a new hei distributor. What can cause
the lack of power?

8 Answers


Lack of power may be low compression on engine,do a compression check on it,all so check the timing.

1 of 1 people found this helpful.

If it's running hot and the transmission (automatic) is shifting late as well it's a worn timing chain. HTH. -Jim


It dont run hot at all and shifts good. Could it be my carb?

1 of 1 people found this helpful.

Check the ignition timing and run a compression test as TST said. If the ignition timing is retarded (late) that'll cause a loss of power. Poor compression will too. Is this a higher mileage vehicle? HTH. -Jim


Its got 150,000 on it. Dont believe the motor has ever been broke into.

1 of 1 people found this helpful.

Ok, it is possible that the timing chain needs to be done. Back in those days GM was using a plastic camshaft sprocket which tended to fail. I had to do the one on my '70 Catalina at 168,000 miles. But do the other tests first. HTH. - Jim


Ok thanks

1 of 1 people found this helpful.

You're welcome. Glad to help. -Jim

Your Answer

C/K 20

Looking for a Used C/K 20 in your area?

CarGurus has 22 nationwide C/K 20 listings and the tools to find you a great deal.


Chevrolet C/K 20 Experts

  • #1
  • #2
  • #3
View All

Related Models For Sale

Used Chevrolet Corvette
290 Great Deals out of 20,686 listings starting at $2,990
Used Ford F-150
2,274 Great Deals out of 181,624 listings starting at $1,000
Used Chevrolet Blazer
1,045 listings starting at $950
Used Ford Mustang
713 Great Deals out of 38,357 listings starting at $895
Used Chevrolet Camaro
396 Great Deals out of 30,562 listings starting at $3,550
Used Ford Bronco
188 listings

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.