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Not firing on front 2 cylinders  Rating:  Rating
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 Posted: 04-13-2007 04:12 am
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Joel
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    Car was running great.  I changed the oil and decided while I was down there I should do a little more degreasing.  I have been cleaning things up slowly and I decided I could shine things up a little more.

On a warm engine I used a little simple green and then hosed things down - gently. 

I started the car up to warm it back up and get all the H2O to evaporate.   I even took a towel and cleaned out around the plugs etc.

Now the car isn't firing on the front 2 cylinders.  I have spark.  The front plugs looked really bad - no fire so they were wet and sooty.  I swapped the front 2 plugs with the 2 rear plugs.  Still no fire on the front - the rear 2 fired up fine. 

If I pull a plug and ground it out on the head - I get spark.  It might not be the strongest spark I 've ever seen but it seems like it should be enough to fire. 

It's been run down the road more than 10 miles - mebbe 20 - so it's been warmed up sufficiently to dry everything out.

I'm wondering if something is wrong with the front carb.  Thinking this I sprayed some carb cleaner in the carbs to dissipate any h2o that might have been in there.  Still no fire on the front 2. 

I'm running Dell 40's. 

This is kind of silly.  What do you think I did?  Any ideas?  I was thinking of putting in new plugs - but swapping front to rear didn't make any difference.  The front carb has good 'suction' when you put your hand over the stacks - seems equal to the rear carb. 

Ideas?  My mechanic is far enough away I'd need to trailer it up so I'd be berry berry happy if I could get the old girl running right.  2 cylinders isn't enough for me - I have a hard time just making up the hill to my house!


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 Posted: 04-13-2007 08:35 pm
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frank12873
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My car (with Stroms) does this also, usually after sitting for a couple of weeks. I've always been able to get the other two cylinders making power by tapping (USUALLY lightly) on the carbs and then driving a short distance.

One good thing about this is, it feels really cool when the other two cylinders kick in as you drive!

I've always thought that, in my particular case, either one of the carb jets is clogging up, or one of the floats is sticking and starving a carb of gas. The tapping has never failed to get things working normally again for me. I have every intention of rebuilding my carbs someday, using Mark's tech article as a guide, but haven't gotten around to it yet.

Good luck!

 

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 Posted: 04-13-2007 09:38 pm
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Joel
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Sounds like you have a sticky float.  I'm not sure that's my trouble. . .


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 Posted: 04-14-2007 03:05 am
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Jensen Healey
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Back to basics. You hosed the engine with water and now the car runs poorly. Have you removed the dist cap and applied the WD-40?

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 Posted: 04-14-2007 04:52 am
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Mark Rosenbaum
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Kurt may well have the right of it.  Sometimes all it takes is a virtually invisible film of moisture inside the distributor cap, particularly if the cap is old and some carbon dust from the rotor contact button is also present.

I'll take this opportunity to comment that dielectric grease, available at most auto parts stores, is great for making a car's ignition system quite water resistant.  Simply apply thin rings of the grease to the base of the dist. cap where it attaches to the body of the distributor, and to the open ends of the boots on each high voltage wire.  Just keep the grease away from the electrical connectors themselves.

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 Posted: 04-14-2007 04:29 pm
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Joel
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First thing I did was take off the dist cap and make sure it was dry and the contacts were clean.  I'll give that another shot though. 

I've given her a day to think about the error of her ways.  Now I can get back on it.


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 Posted: 04-25-2007 03:23 am
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Joel
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Mystery Solv-ed!

Damn, I went thru a bunch o little stuff.  Dried everything out w/ WD40.  Cleaned plug wires, used carb cleaner on the carbs to dry them out.

And then, I replaced the plugs - didn't do it.  Replaced the plug wires - didn't do it.  Finally, replaced the rotor cap - Guess what?  NOW I can see the hairline crack on the inside between two electrodes.  Probably between 3&4. 

Now, if I can just figure out why my brakes is acting funky. . .  They seem to be sticking so that they only work on one side - and maybe only on the front (on one side) once in a while. 

Ummmm, it's been a little hairy a couple of times.  Like that time I was doing 100mph on the freeway and the car pulled over in front of me. . .  Oh yes, and the time I was racing around the mountain roads with Dana who also has a JH and it felt like only the right front brake was working - and working well.  Fortunately, I coming into a tight left hand curve - hot. . . . that made me glad I could slide around a curve at 50mph. . . .

Any ideas on the brakes?

Cheers,

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 Posted: 04-25-2007 06:16 am
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Mark Rosenbaum
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Joel wrote: Now, if I can just figure out why my brakes is acting funky. . .  They seem to be sticking so that they only work on one side - and maybe only on the front (on one side) once in a while. [...] it felt like only the right front brake was working - and working well.

Most likely that would be due to shredded lining on the brake hose to the sticking side -- the hose acts as a one-way valve and allows brake application but not release.  Or the hose to the dead side could have collapsed internally.  The OEM brake hoses seem to have a lifespan of 30-35 years, so any original hose can be expected to fail without warning at any time.

Another possibility is one or more sticking caliper pistons.  Naturally one might have both problems at the same time.  The JHPS Club Store and Delta Motorsports offer quality brake parts for very reasonable prices.

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 Posted: 04-25-2007 07:02 am
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Joel
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It's even more perplexing b/c it's not consistent.  It seems to usually be the right side pulling.  But on occassion it's the left.  I'm thinking new lines all the way around. 

I've never been happy w/ the brakes.  Even w/ new pads all the way around and a new master cylinder I don't think I can lock them up.

And what I mean by 'sticking' isn't that the brake doesn't release.  Poor explanation on my part.

What's happening is that upon hard braking it feels like the only tire braking is the right front.  Very hard dive to the right almost uncontrollable at high speeds.  And on other occassions it dives left - but not as drastic as when she goes right. 


Last edited on 04-25-2007 07:04 am by Joel

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