20 Most Recent 1978 Chevrolet C1500 Questions & Answers

If I understand the post correctly, kinda sounds like the firing order is off. Firing order should be 18436572. Could be out of time as well. That is where I would start.

1978 Chevrolet... | Answered on Dec 17, 2017

Did you check the starter and starter relay. If the starter is failing it will require more voltage than usual to turn over and start the truck. Heat soaking can also be a problem. Check the wiring to the starter and any wiring you reconnected when you replaced the alternator.

1978 Chevrolet... | Answered on Sep 19, 2017

This is not hard... you just need the tools.. autozone should have the loaners... get one of these...

Repair Manual Vehicle Maintenance

1978 Chevrolet... | Answered on Aug 02, 2017

If there's no oil cap directly on one of the valve covers (it may have a breather hose attached which connects to the breather element in the breather pan), then some models require adding oil through the dipstick. If this is the case, there should be a cap type dipstick instead of the standard "hook". There are 6 different motors (8 including variations) for your truck so no manual has the exact location of the oil cap. Best of luck and hope I answered your question.

1978 Chevrolet... | Answered on May 02, 2016

If it is a 4 barrel you need to run a higher octane than a 2 barrel. You need to check your timing and readjust your mixture and air flow.

1978 Chevrolet... | Answered on Mar 12, 2015

There are 3 separate belts, one for the alternator, one for the power steering and one for the A/C. You don't need a diagram, you just look at what groove lines up with what accessory and place the proper length belt on that set of pulleys.

1978 Chevrolet... | Answered on Aug 04, 2014

Basic task is to take the nut off the top of the joint, and knock the stem out of the knuckle or joint. You may need to use a pickle fork to get it to move.
Then you unscrew the end from the coupler.
Be sure to measure the length of the assembly before you remove it, you may need to have the front end aligned after the procedure.

1978 Chevrolet... | Answered on Jul 16, 2014

1979 chevy C1500
the vacuum setup varies,
by (california, Federal (USA) and export models)
where are you, or if in USA the under hood sticker shows if calif.or not.

if in usa, use the FSM (buy one used) or use alldata.com
on USA cars , (not sure starting year, this one is old) the vacuum
map is on the underside of the hood. (not not painted over,etc)

1978 Chevrolet... | Answered on Jul 01, 2014

you can buy an itake to convert it you dont need to change the heads the 4 center bolts have just a slightly differant angle then change the distributar slap a carb on and put an inline fuel pump and your good to go

1978 Chevrolet... | Answered on Jan 31, 2014

here ya go

1978 Chevrolet... | Answered on Nov 05, 2013

Some things you can check. First, with the engine off, look down into the carburetor and quickly move the throttle. You should see a squirt of fuel. If not, the accelerator pump is bad. If that is OK, check the spark itself. It should bridge a half inch gap with no problem and should be healthy (have good "snap" and bluish color). If OK, check the two wires that run from the ignition module inside the distributor, down under the breaker plate.Often those wires can partially break or short to the housing...when the advance moves the plate it will cause a problem.
Only other thing I can think of is timing. That engine likes from 8 to 12 degrees advance (depends on fuel quality) if it's set wrong it can make it fall on it's face when you floor it. (bad chain can do that too).

1978 Chevrolet... | Answered on May 28, 2013

bad spring -bent hood-or bolts loosened on hinge -

1978 Chevrolet... | Answered on Mar 31, 2013

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