350 has no power

30

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

66,565

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.
68,635

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

30

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

1 of 1 people found this helpful.
68,635

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

30

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

1 of 1 people found this helpful.
68,635

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

30

Ok thanks

1 of 1 people found this helpful.
68,635

You're welcome. Glad to help. -Jim

Your Answer

Add photo

Related Questions

  • 350 has no power 8 answers

    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 ...

    1974 Chevrolet C/K 20

    -

    Maintenance & Repair

  • why does my pickup die at idle and has no power 2 answers

    truck dies at idle and no power. shop replaced intake manifold gasket, fuel pump and filter, egr. two months ago carb rebuilt. New plugs, wires rotor and distributor. When going up a grade, no pow...

    1985 Chevrolet C/K 20

    -

    Maintenance & Repair

  • 1985 chevy pickup c 20 no leaks anywhere still overheating 3 answers

    replaced radiator and thermostat, still goes to red on 2minute idle, no leaks anywhere, did pressure test doesnt lose power

    1985 Chevrolet C/K 20

    -

    Maintenance & Repair

  • starter not getting power to turn over motor 6 answers

    last time i started my truck every thing work, i put a new ringgear, starer, wires, battery, but now i have power to stater?

    1978 Chevrolet C/K 20

    -

    Maintenance & Repair

  • 82 350 spiiting 10 answers

    Recently bought an 82 k20 350 with "carberator" problems. Rebuilt the carb, replaced the plugs, set the timing. Cranks right over and idles like a champ but runs like absolute junk. At a lose at th...

    1982 Chevrolet C/K 20

    -

    Maintenance & Repair

C/K 20

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

CarGurus has 26 nationwide C/K 20 listings and the tools to find you a great deal.

ZIP:

Search Chevrolet C/K 20 Questions

Chevrolet C/K 20 Experts

#1 F_O_R
F_O_R
Reputation 100
#2 kayzen
kayzen
Reputation 80
#3 Runningfree1988
Runningfree1988
Reputation 60
View All

Related Models For Sale

Used Chevrolet Blazer
1,168 listings starting at $1,495
Used Ford F-150
2,121 Great Deals out of 193,348 listings starting at $290
Used Ford F-250
465 listings starting at $4,390
Used Ford Mustang
683 Great Deals out of 44,710 listings starting at $1,500
Used Dodge Challenger
262 Great Deals out of 22,440 listings starting at $7,995
Used Chevrolet Camaro
354 Great Deals out of 31,327 listings starting at $2,200

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.