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Thread: i broke my truck, too...:(
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mwpayne
Hauling
Posts: 195
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posted May 04, 2008 05:47 PM |
 Edited By: mwpayne on 4 May 2008 17:49 |
I broke my truck, too...:(
Funny how once the weather gets warm, we all get out and fork up our beloved lil' twuks...
well, my deal is this. Drove it out to the mall yesterday to pick up some stuff, ran superbly. Almost home, noticed a slight miss. Miss got worse. Got it home, found front lower plug loose, pulled, cleaned. Hard to start, flooded.
Good deal of smoke when it did, cleared right up. Still a miss. Hmm. Got new plugs today. Still a miss. Pulled all the new plugs to examine. All looked normal..except for the upper (T) rear, it was carbon caked. I pulled the wire while running, you could hear it sparking, though.
Now, to back up a bit, I've just rebuilt the carb sucessfully, I think, but I have been screwing with the idle controls more or less constantly trying to get it just right. The miss only happens under load, revs smooth in driveway. Tried new plugs/wires, cap is mazda and got maybe 50 miles on it, same with NGK wires. Also, with that miss comes a sound of the dreaded 'ping' so theres a lean condition there..scary as hell.
Does this sound like fuel or electrical to you guys?
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mwpayne
Hauling
Posts: 195
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posted May 04, 2008 06:15 PM |
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Just to diagnose further, after it got dark I started it up and revved it some to see if I could tell if I could see some spark leak of some kind. Nope. If you get on it while idling, it will bog a bit and you'll hear a momentary ping ( I HATE that..), makes me think that somehow fuel is not getting where it needs to go in a timely manner..
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kansei
Redlining
Wankelized
Posts: 423
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posted May 05, 2008 08:13 AM |
Edited By: kansei on 5 May 2008 08:15
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Hmmm...
I'm just guessing here, of course, but it sounds like you have the carb leaned out too much, like you said due to the ping. If a plug is caked, though, and not burned, that may contradict that though..? Maybe a float got bumped when you were reassembling the top plate of the carb?
Another thought is you may have a coil going bad?
Neal.
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mwpayne
Hauling
Posts: 195
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posted May 05, 2008 08:54 AM |
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Well, I'll probably never know, because I shotgunned it this morning. I pulled every plug, cleaned. Pulled every wire, coil wires too, cleaned those. I cut fuel and put a piston compression tester in the plug holes just to make me feel better, looked and sounded ok. Bought some seafoam, poured 2/3 in the gas tank, the rest down the carb, gave it a couple cranks. Let it sit a couple of hours, cranked again. Put everything together.
Runs fine. Won't idle worth diddly,'cause of my continually messing with it, but that's fixable. Power back, miss and ping gone.
Beats me, had to be a bad connection somewhere or piece of crud. 'Preciate the response!
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tom93r1
Redlining
Posts: 458
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posted May 05, 2008 04:03 PM |
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Its nice when you fix something and dont really know what it was you did that fixed the ultimate problem :)
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mwpayne
Hauling
Posts: 195
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posted May 05, 2008 04:49 PM |
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Still a slight problem, BUT..
I think I've nailed it.
Running like a champ all day, idle still lumpy and intermittantly high/low, hard to adjust. I was gearing up out of a red light when the miss came back, worse than before. Dammit.
Then, I remembered Klaus posting more than once about proper and clean grounds. Plus, I've owned several RX7's, that's always an issue with those beasts. I came right home and ran a heavy ground wire from the engine block to the battery frame ground, cleaned same. Cleaned and/or replaced every other ground I could find. I tell you, this truck started before the first revolution was complete, and has NEVER had a better idle. Acceleration and power better than I'ver ever had with this truck. HUGE difference!
The next thing is to put heat sink compound on the ignitors on my 1st gen distributor, those have been known to get hot and cut out.
But that extra ground, I highly suggest that guys. Radio plays better, birds sing sweeter, sun is brighter, sex life might even be better! :)
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Klaus44
Redlining
Posts: 365
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posted May 05, 2008 09:21 PM |
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Just saw this thread...
...nice to read the happy ending!
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sparky
Redlining
Posts: 299
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posted May 05, 2008 09:32 PM |
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If you haven't already...definitley upgrade to the DLDFIS ignition upgrade. I spent alot of time clean jets thinking it was the cause of rough idle and stubling on acceleration or cruising.
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mwpayne
Hauling
Posts: 195
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posted May 06, 2008 06:02 AM |
Edited By: mwpayne on 6 May 2008 06:03
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I was reading Jeff20B's site about that just last night...
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