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Username Post: Is this timing or something else        (Topic#350649)
KaelFarmer 
Senior Member
Posts: 1006

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: 35054
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: 1006

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: 35054
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: 1006

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: 35054
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: 1166
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: 1006

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



 




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