traintech55
Senior Member
Sounds like you found it. Replace the wire and see what happens. If you do not have the cable holders on the engine I would out them on so it doesn't happen again.
67 Newport sounds like its 'missing', any ideas??
- Thread starter OneEyed
- Start date
Shoot, not so fast I guess. I did some more research and apparently continuity is not the way to test these. I DID measure resistance across, so I pulled another cable and it tested the same. IIRC, 7 or 8k ohms. But I still feel like that one cylinder is not firing since I don't notice any difference when I unplug it or re-plug it in.
traintech55
Senior Member
What cylinder is it in the firing order?
traintech55
Senior Member
I hate when I answer someone, and then remember something else. If you are sure of the cylinder, get a good plug, install the wire on it, ground it go to the block and see if it sparks, if not try a cap and rotor
I put in a new rotor since they're cheap enough, cap looked good and was probably replaced some what recent before I bought it.
It is the #2 cylinder which would be last in the firing order.
traintech55
Senior Member
Did you make sure you had spark on that cylinder. If you have a good spark, the next step is to pull the valve cover and look at the action of the rocker arms. Don't take anything apart except the cover and run the engine, be careful of the oil but for a few min. it won't be a problem. See if both valves are working.
The Horvaths
Young man with a cowboy hat
Can't help with that, but you can get a free FSM from MyMopar on your phone.
65sporty
Old Man with a Hat
About 125-150 psi
I think I got it fixed. Bad spark plug, even though I just put them in a year or two ago.
In the process of troubleshooting I bought a spark plug tester that is basically like a test light that you plug in between the cable and the spark plug and it lights up to show that you're getting good power.
Also checked compression on #2 and then #1 to compare....checked out okay, but found out after the fact that I didn't do the test properly. That's what I get for listening to the guy behind the counter at O'Reilys, at least I could loan the tool from them for free. I had about 110 psi and 130psi respectively. But all I did was pull one plug, insert the tester and start the engine, rev'd it a little then took a reading.
After all that I got my hands on a laser pointer temp gun from another mopar buddy. I used that to measure the heat at each cylinder, then I could prove that #2 was never getting as hot as the rest of them.
He also gave me a set of Accell spark plugs and some Jacobs cables for free! Nice guy! I swapped out that #2 plug and it fired up, sounded great right away! So I replaced the rest of the plugs and took it for a drive.
Anyone know what could cause a plug to go bad so soon? I had Autolite 85's in there before.
oh and Thanks for all the help!!
In the process of troubleshooting I bought a spark plug tester that is basically like a test light that you plug in between the cable and the spark plug and it lights up to show that you're getting good power.
Also checked compression on #2 and then #1 to compare....checked out okay, but found out after the fact that I didn't do the test properly. That's what I get for listening to the guy behind the counter at O'Reilys, at least I could loan the tool from them for free. I had about 110 psi and 130psi respectively. But all I did was pull one plug, insert the tester and start the engine, rev'd it a little then took a reading.
After all that I got my hands on a laser pointer temp gun from another mopar buddy. I used that to measure the heat at each cylinder, then I could prove that #2 was never getting as hot as the rest of them.
He also gave me a set of Accell spark plugs and some Jacobs cables for free! Nice guy! I swapped out that #2 plug and it fired up, sounded great right away! So I replaced the rest of the plugs and took it for a drive.
Anyone know what could cause a plug to go bad so soon? I had Autolite 85's in there before.
oh and Thanks for all the help!!
Happenstance... everyone has a bad plug once in a while
traintech55
Senior Member
Had a feeling it was a bad Spark Plug. Seen it happen with Autolite's. main reason I use Champions. Glad you found it.
I really need to learn to not rule out the new parts when troubleshooting just because they're new. Had the same problem with the fuel sending unit that was also new and the new steering gearbox that i replaced again after a year.
I've been so spoiled for the last 15 years of driving Hondas that i really haven't spent much time under a hood.
I've been so spoiled for the last 15 years of driving Hondas that i really haven't spent much time under a hood.
You've been driving 40 year old honda's???
Got to keep in mind the era and the age to help temper these sort of issues... also the new parts supply is not really as good as the older parts as a rule.
Strange the Honda store in our group's service department is always jammed with broken down Honda's
......weird must be a regional thing lol
Thankfully they all break, and if you push it with maintenance they will eventually break more... I have no idea what use I would have ever been without broken cars.Strange the Honda store in our group's service department is always jammed with broken down Honda's
I guess when all you see day after day as a "Technician" is one brand of car its easy to get the opinion that they are less than reliable however i find it funny that the worst cared for cars in staff parking are the Tech's and they are usually the same brand because parts are cheaper at staff price for them lol
traintech55
Senior Member
I have a story about this you guys will love. Back in 1983 I was working for a Pontiac dealership in the Chicago area. A customer ordered a new Diesel Grand prix. The day it came in was - 10 degrees outside and we had to push it off the truck as it would not start. It gets pushed into my stall. and with everyone going crazy to deliver this car, I troubleshoot it and it turns out to be a bad Glow plug module, of course we do not have one in stock, so it was overnighted for delivery the next day, 10:00 am, the part comes in, I install it and guess what, still no start, I went nuts going back over all the diagnostics, and it kept steering me back to this damn module. Finally after arguing with the service manager, he ordered another one, "Just to prove me wrong". Guess what happened after module # 3 was installed, started right up, so again I have seen brand new parts fail right out of the box.
live4theking
Old Man with a Hat
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Back in the early 90's when I was 20ish and had my first 69 NYer I knew nothing about car, not much less than now. I was living in TX and was planning to drive it home to PA. I thought I'd do the right thing and do a tune. I bought the most expensive Bosch spark plugs. The drive home was going flawlessly on I-70 headed east into Pittsburgh the car started acting up a bit; missing, preignition... It kind of settled down by the time I got home 2+ hours later. A couple of days later it started acting up again coming up the hill to my parents. Dad heard coming and when I got in the house he said to leave the keys for him (retired mechanic). The next morning when I lazily got out of bed he had it in the garage, he called me out and showed me the problem - the nice expensive Bosch plugs I'd bough with my messily airman's salary. Not even a month old he tossed them all in the trash and put a set of Champions in it. Problem solved. He told right then that Champions were what should be run in a Chrysler, period. I don't know if this holds with the new stuff or not, but that's all that I put in the old ones.
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