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Hi there my c3 350 engine will only run for 500 yards then runs bad then just stops dead . If I wait 10 minutes it will run again any idea if the ngk 1127 bpr4fs plugs could be the problem they are new . Many thanks ivo
Hi there my c3 350 engine will only run for 500 yards then runs bad then just stops dead . If I wait 10 minutes it will run again any idea if the ngk 1127 bpr4fs plugs could be the problem they are new . Many thanks ivo
You have other issues.......a spark plug(s) will not cause an engine to die all of the sudden.........and if it did, you would not be able to start it again.
You need to put a year, make and engine here as well as any mods......pictures help also.
I have never heard of BPR4FS as an application for a Chevrolet V8.......refer to the chart:
Anyway.....you have fuel or ignition trouble......
Hi there the engine is a 1983 c3 engine from a corvette stingray 50.000 miles . I have fitted a complete separate fuel system electric pump etc . It still cut out . I have fitted a new inlet gasket with the stainless steel inserts . So no heat risers . A new coil condenser and ballast resister. New gasket from carb to inlet . New power valve in the carb . Hi leads were new . When started it runs fine . If I drive it 500 yards it cuts out most times . Two days ago it ran for five miles then packed up again . Today I run it for 20 minutes stationary the passenger side bank run rough the engine still ran . ? Ps I have run it with a wire from the battery to the coil twice the first time it ran ok the second time bad
CFK engine suffix and 14010201 comes back as a 1982 305ci Crossfire engine for 82' Z/28. Yours has been fitted with a pre-1974 points distributor and a Q-Jet four barrel manifold. It also appears you have an adapter to mount an Edelbrock carb on this engine.
A few things:
You need to go through and inspect the points for burned contacts.
Replace the plugs with NGK 6630 (UR4)
You need 7 volts at the coil while running. Do not jump the wire again or you can damage the coil. The jump test is a valid one, but only to be performed for a short period of time.
After inspecting/replacing the points, the distributor point dwell needs to be checked. You will need a dwell tach to do this. The accepted dwell setting is 28-30 degrees.
Once the dwell is checked....set the total timing for 36 degrees at or around 3000 rpm. You need a dial back timing light for this. Plug the vacuum advance back in after you are through to full manifold vacuum.
Now move on to the carb......put a vacuum gauge on a full manifold vacuum port and set the idle screws while running for the highest readable vacuum on the gauge.
You have that absolutely terrible adapter on that intake to make that carb function on that engine......without getting into to it too deeply, you may get it to run ok, but that engine will never perform as it should with that adapter/intake/ carb setup......I urge you to get a correct carb for that manifold or a new intake like the 2701 Performer EPS.
Verify your fuel pressure......with that carb you need 6psi or less to function proper.
This may seem like a lot.......but this is standard operating procedure for a trained mechanic over 40 years ago.
Hi Jebbysan just one thing the spark plugs fitted to my engine are short reach the ones you recommend look like long reach is that correct for the cast iron heads on my engine . Many thanks ivo
Hi Jebbysan just one thing the spark plugs fitted to my engine are short reach the ones you recommend look like long reach is that correct for the cast iron heads on my engine . Many thanks ivo
The coil and ballast need to be correctly "paired" to operate at 4 amperes.
Voltage is irrelevant. At 4500RPM that coil fires 300 times per second. It charges so fast, your meter only detects the voltage drop after the coil windings are saturated.
.035 plug gap.....point gap set with a paper match....setting the dwell determines final point gap.
Jebby
Jebby I was on this forum almost a year prior to picking up my 72, learning about these unique and special cars. It is from people on this forum like yourself who continually stop what they are doing and help a brother in need that makes this such a great place.
I hope that moving forward as I learn more about these cars, I can contribute at least fractionally as you and others continue to do.
Much appreciation and respect.
Platinummaker. (Dave)
Jebby I was on this forum almost a year prior to picking up my 72, learning about these unique and special cars. It is from people on this forum like yourself who continually stop what they are doing and help a brother in need that makes this such a great place.
I hope that moving forward as I learn more about these cars, I can contribute at least fractionally as you and others continue to do.
Much appreciation and respect.
Platinummaker. (Dave)
Thank You.....I just try to stick with the facts, I am happy to help as it is very gratifying to share knowledge....I oops from time to time myself and this forum is pretty easy on me .....I was shown the right way to do things by some of the best in the industry, but the industry was not for me....way too difficult to make a living, so I just work out of my 2.5 car garage and help a LOT of people out........one thing that will never change is that I have loved engines since I was a little boy, love em', and to work on old ****, you have to love em'! LOL.
For the OP for instance......it is first important to understand what he has. He has an 82' Camaro 305 engine with a 72' ignition on it.....but told it was a 350 C4 Vette engine (83' LOL)....which means they only lied a little bit...LOL......now he knows what to do with the points, etc... something that may have thrown him for a loop.....but now he KNOWS what he has.
The information is all out there, but not everyone can sift through the mess to find it......I started early learning facts and figures as early as 9 years old (1980). I grew up in Pontiac, MI so I was in the epicenter of motordom.
The folks that know these cars are aging unfortunately.....and it is now up to my generation to keep the faith I guess......because if it wasn't for them, I couldn't type any of this.
Hi Jebbysan. More confusion over spark plugs I went to my agent for the ngk 6630 ur4 . He said they were listed but these are the modern equivalent. Bkr 6ek . Which as you see are long reach . Also these on eBay. So can these plugs under that reference number be long and short reach . Thanks ivo
Hi Jebbysan. More confusion over spark plugs I went to my agent for the ngk 6630 ur4 . He said they were listed but these are the modern equivalent. Bkr 6ek . Which as you see are long reach . Also these on eBay. So can these plugs under that reference number be long and short reach . Thanks ivo
There is no confusion.....your agent is wrong, and trying to confuse you because he doesn’t know what he is doing.
Buy the 6630 (UR4) and put them in.
06-09-2020, 06:53 AM
Ngk spark plugs
.....I was shown the right way to do things by some of the best in the industry, but the industry was not for me....way too difficult to make a living, so I just work out of my 2.5 car garage and help a LOT of people out........one thing that will never change is that I have loved engines since I was a little boy, love em', and to work on old ****, you have to love em'! LOL.
