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Username Post: Is this timing or something else        (Topic#350649)
KaelFarmer 
Senior Member
Posts: 1009

Loc: Eau Claire, WI
Reg: 03-28-02
04-16-18 10:44 AM - Post#2731169    

Recently while driving my 77 vette I encountered a couple of issues that I am not sure if they are a timing problem or if there is another possible issue. I have not yet had the time to go to get my timing light to check.

While driving, the car developed what initially felt and sounded like a misfire. Because the plug wires are heavily shrouded I have not been able to see if the plug wires are arching between them.

Since I was driving at the time that this occurred, I noticed that the car was still able to maintain speed although it seemed to have to work a little more. I continued to drive the car until I arrived at home approximately 50 miles since the misfire developed. At the same time of the misfire starting, I noticed a ticking noise similar to the lifters in my 55.

Since getting the car home, I have started it a couple of times to listen to see if I notice anything else. This car has true dual exhaust without catalytic convertors. It also does not have a crossover pipe. The engine is a base model 350. I have noticed that the exhaust on the drivers side is noticeably cooler on the left side than the right side. I don't know the actual temperature, but I can feel the difference against the back side of my hand. The misfire seems to have also caused a backfire through the carb.

This car has approx 167,000 miles and the engine has not been opened up to the best of my knowledge. I have the maintenance records from the original owner and after work today I will be looking back to see if the timing chain has ever been replaced.

Where should I be looking to find a solution to this misfire condition?

Thanks,
Kael



 




TAT_2 
"17th Year" Silver Supporting Member, and Official CT Grim Reaper
Posts: 35135
TAT_2
Age: 64
Loc: "UNDER THE BOARDWALK"
Reg: 10-29-00
04-16-18 04:06 PM - Post#2731199    
    In response to KaelFarmer

START IT UP WHENS IT REALLY DARK,YOU'LL SEE IF THERE'S A ARK FROM THE WIRES TO A GROUND. CHECK THE DISSY CAP INSIDE ALSO & THE ROTOR.

09 PONTIAC- VIBE
08 PONTIAC- G6
96 FURD F-150 SUPER CAB XLT 4X4
93 VETTE - 40TH ANIV RUBY RED LT1/6SPD/RAG TOP
NEXT ?


*****
PREVIOUS VETTE'S 58,68,70,76,78,85,90
*****


Blessed are the cross-eyed, for they will see God twice


 
KaelFarmer 
Senior Member
Posts: 1009

Loc: Eau Claire, WI
Reg: 03-28-02
04-16-18 06:06 PM - Post#2731218    
    In response to TAT_2

That is what I was trying to do, but i will need to remove the covers from over the wires and distributor cap. I am planning to start with haveing replacement cap, rotor, wires and sparkplugs available to put in when I do take off the wire covers

Kael



 
TAT_2 
"17th Year" Silver Supporting Member, and Official CT Grim Reaper
Posts: 35135
TAT_2
Age: 64
Loc: "UNDER THE BOARDWALK"
Reg: 10-29-00
04-17-18 03:38 PM - Post#2731326    
    In response to KaelFarmer

HAD ANOTHER PROBLEM ONCE.WAS PUTTLIN A AM/FM RADIO/CASETTE PLAYER IN HELEN'S FAIRMOUNT. KEPT HEARING A POPPIN/ STATIC NOISE ON IT.WAS A BAD FACTORY CRIMP ON A SET OF WIRES I ALSO JUST INSTALLED.SO EVERY TIME THAT CYL MISS FIRED I COULD HEAR IT THRU THE RADIO.

09 PONTIAC- VIBE
08 PONTIAC- G6
96 FURD F-150 SUPER CAB XLT 4X4
93 VETTE - 40TH ANIV RUBY RED LT1/6SPD/RAG TOP
NEXT ?


*****
PREVIOUS VETTE'S 58,68,70,76,78,85,90
*****


Blessed are the cross-eyed, for they will see God twice


 
KaelFarmer 
Senior Member
Posts: 1009

Loc: Eau Claire, WI
Reg: 03-28-02
04-18-18 02:48 PM - Post#2731456    
    In response to TAT_2

Aren't electrical issues fun to deal with????

At least I hope that this is an electrical issue. I obtained the car last fall after it had not been driven for approx 8-9 years. I had a local shop look it over to fix what needed to be done so it could be roadworthy. I was told to take it for a shakedown run. Needless to say, the mechanic was quite surprised when I told him that I needed to schedule another oil change after a long weekend. I think the mechanic thought a shakedown run was 50 - 100 miles not 3200.

Now, back to my issue. This issue was a sudden occurrence with no indication of a potential problem. I had driven the car approximately 350 miles and was on my way home from an out of town trip. While driving at about 45-50 mph, the misfire suddenly started and continued the remainder of the drive home which was about 50 miles.

Kael



 
TAT_2 
"17th Year" Silver Supporting Member, and Official CT Grim Reaper
Posts: 35135
TAT_2
Age: 64
Loc: "UNDER THE BOARDWALK"
Reg: 10-29-00
04-19-18 03:19 PM - Post#2731587    
    In response to KaelFarmer

YA KNOW THE PROBLEM IS ON THE L-BANK SO FAR,SO IF YA HAVE 1 OF THEM LASER HEAT TEMP READERS,I BOUGHT 1 A COUPLE YEARS BACK,YOU CAN TAKE A READING OFF THE EXHAUST MANIFOLD AT EACH CYL YOU CAN NARROW IT DOWN.ONCE YA ELIMINATE THE FIRING PROBLEM,THE NEXT STEP WILL BE THE MECHANICAL PART.
------------------------- ---------------
HAD A PROBLEM WITH THE 78,WOULD START 1 TIME & NOT THE NEXT OFF & ON. AFTER CHECKING A FEW THINGS I FOUND THE MECHANICAL ADVANCED WEIGHTS IN THE DISSY WERE STICKING,YOU WOULD THINK THE TIMEING CHAIN BUT IT WASN'T.
SO BASICALLY I CHECK THE EASY 1ST,THEN GO FROM THERE.

09 PONTIAC- VIBE
08 PONTIAC- G6
96 FURD F-150 SUPER CAB XLT 4X4
93 VETTE - 40TH ANIV RUBY RED LT1/6SPD/RAG TOP
NEXT ?


*****
PREVIOUS VETTE'S 58,68,70,76,78,85,90
*****


Blessed are the cross-eyed, for they will see God twice


 
junkman104 
Frequent Contributor
Posts: 1194
junkman104
Age: 59
Loc: Murphy N.C.
Reg: 01-25-14
04-19-18 05:43 PM - Post#2731604    
    In response to TAT_2

I chased a skip in my C3 until I pulled the factory alum. intake off to find a crack in it. Sometimes vacuum leaks are hard to find also.



 
KaelFarmer 
Senior Member
Posts: 1009

Loc: Eau Claire, WI
Reg: 03-28-02
04-21-18 11:37 AM - Post#2731756    
    In response to TAT_2

That is why I am asking for others to share their wisdom. I would rather know if others may know of an easy solution before I automatically jump to the hard one.

Kael



 
grumpyvette 
Senior Chevytalk Moderator -- Performance Subject Matter Expert --
Posts: 17168
grumpyvette
Age: 70
Loc: FLORIDA USA
Reg: 03-16-01
06-09-18 09:10 AM - Post#2736397    
    In response to KaelFarmer

the idea of using a ir temp gun to locate a mis-fire cylinder is valid, if you post clear color pictures of the labeled by cylinder number spark plugs it could in many cases provide valid useful related info.

IF YOU CAN,T SMOKE THE TIRES AT WILL,FROM A 60 MPH ROLLING START YOUR ENGINE NEEDS MORE WORK!!"!
IF YOU CAN , YOU NEED BETTER TIRES AND YOUR SUSPENSION NEEDS MORE WORK!!


 




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