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[video]http://www.youtube.com/watch?v=CSv0FojidV4[/video]
Alright, So thats some shots of the car in question here.
A few months ago this car was brought to me with sudden a no-start. I repaired some hacked up wiring, removed wires for items not used anymore (for racing) and re-routed the passenger side main harness out of collision danger. The cause to that problem then was a burned ECU. And it was thought it was caused by the cars driver washing the car interior out with water and getting the ECU wet. Replaced the ECU and it ran fine for months.
Attempts at repairing the ECU were fruitless. After repairing two traces that were burned through and replaced two burned diodes related to the burned traces, the ECU was still internally shorted.As soon as I throw power to it, it blows the engine fuse.
The new ECU worked fine for months, until the driver moved the vehicle, parked it and when trying to restart it an hour later, it was blowing ECU fuses again and not starting. The owner put in a THIRD ECU and it fires right up and runs. Inspection of the second ECU that was blowing fuses the SAME two traces were burned. Repairing the burned traces leaves a shorted ECU that blows the engine fuse. Yet a replacement ECU works fine.
Shaking, pulling and twisting wires, connectors and components with the engine running has not shown any faults. I cannot reproduce the problem that is shorting the ECU.
Here are pics of the burned traces. I see no damaged components.
The ECU burns traces between the Positive side of Capacitor C2 and the Anode side of Diode D3.
On the back side, the trace between the Anode side of Diode D2 and pin D1 (Battery +)
Once the traces are repaired, the ECU still blows the engine fuse. Yet a NEW ECU will work fine.The only modification I see to the engine is a O2 sensor simulator.This appears to be wired correctly and securely…But perhaps its faulty?
Thanks for any input.
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Sorry I didn’t update this past week. Its been nuts.
I hooked up a smoke machine to the intake and it was leaking heavily at the intake flange at the head. Once I pulled the intake off, I saw that there were sections of the gasket missing and one small area was folded over on itself on the last install, leaving a gap and a section of doubled-over gasket. No wonder it was leaking.
So a new gasket fixed the crazy high idle.
[b][color=#ff0000]So the race last night:
She placed SECOND. Only her fourth race. She was stoked.[/color][/b]Problems:
(~) 1 * The idle doesn’t adjust itself fast enough. She said the engine shut off on her three times in the race during restarts. Even though I have the idle set at about 1100 rpm. Of course anyone that knows these stupid Honda’s; if you idle it too high it will cut fuel to bring the idle back down, so get that hunting idle problem.So, I’m going to go ahead with what I was going to do anyhow and block off the IACV. So I’ll just crack the throttle place open with the stop screw and adjust the TPS for WOT values and make sure its not going into idle loop any more, so I don’t get the hunting idle. Got all that? Good. :woohoo:
I may also block off the fast idle valve, just to make sure that valve doesn’t suddenly decide to open and screw over my mechanically set idle.
(~) 2 * She said she lost second gear. She said she would put in second and it would be like it was in neutral. She also said it was sticking in third. The shift cables and shift forks feel fine with the engine off. She also said she could only get it into second on restarts, when she was stopped completely. So I’m not sure if she’s talking when she is downshifting from third to second, or trying to go from first to second. I asked her if she was double clutching or trying to rev match and she looked at me like I was a purple rabbit…Okay, so I gotta look into that now. :silly:
We don’t race next week, we’ll have plenty of time to work things out for the next race.
Thanks for the support and help! I need it.
Hey, cool! I found a photo of her car on the track. This is from the second race where she had the front end torn out of it. You can see the black ratchet strap under the front, right wheel in the photo! Its just forward of the wheel and under the radius arm. Heehee!
We’re tied for third in points! Pretty much if we just keep making it out to each race, we should make the podium this year. Thats the nice part about this class. Its so unpredictable. All you have to do it stay in the race and make it to every one and you’ll get enough points to stay in. Engines blow up, people get wrecked off the track. It helps to have a good mechanic to keep the car running every race and make emergency repairs to keep the car in the race if something does happen. :silly:
I fixed second gear. The bracket that holds the shift cables to the transmission case has worked free and was just flopping around. A new bolt and two nuts fixed that. I can’t believe it was shifting at all before!
I “fixed” the idle. I tweaked the TPS up a little bit, to keep it from going into “idle loop”. Blocked off the fast idle valve and IACV and cracked open the throttle butterfly to get a stable idle.
This week coming up, we are doing bodywork/welding to the front end. We pulled the frame out and over a bit from the wreck a few weeks ago. We’re adding a bit of bracing up front so that if she rubs someone on the track it doesn’t crumple her front end into a ball. It was so weak before, if she nudges someone, her driveline would just flop out on the ground. It would be hilarious, if I wasn’t the mechanic on the crew.
Next race is the 19’th, unless it rains out.
Still no “ECU Issues” So at least that original problem has been entirely fixed.
Its been a tough season. Not with this car, but the other cars I work with out at the track. Brand new engines being “Broken in” on race night. Transmissions exploding and having to be changed at the track. Rear ends locking up. Wrecks. We had a really bad one this week on my 83 allstars car where he got bumped out of the curve, over the dirt hill and rolled twice about 30 feet down the hill into the ditch. He hopes to be running next week…So I’m busy every night with that one.
Anyhow. How is the little prelude doing? We are well into third place in points. We are 46 points ahead of 4’th and only 16 points from first place in the season.
We got a second place win…We got a couple third place wins. This past week was a 4’th place finish. The top 4 cars running in our class all lap the remaining runners on the track. Its quite a staggering difference in speed between the top 4 and the rest.
Our car has done so well, a couple people have changed cars to a Prelude. One guy went from finishing last in a Dodge Neon every race to finishing first this past race, by changing to a Honda Prelude, the generation newer than ours. Kinda funny how people will change out to an entirely different car to stay competitive in such a low benefit/return class of racing. But it is flattering that people are choosing a car based off of what we are running.
So I think I have some pics for you guys.
Prelude VS Prelude.
Oh hey! Lookit! That’d be me on the right. Driver in the foreground.
[b]Some pics of the 83 car.
Former Glory[/b]
Wrecked.
Driver on the left.
[b]And some of the other cars I work with.
96 Sportsman
Thats a second place win photo shoot.[/b]
23 Allstars
Next race was last night. PHEW, what a mess.
This car did FREAKING AWESOME. We added a bit of weight front and rear to the left side, to get a bit more traction on the inside wheels.
We actually made is into first place at lap 10 (of 15) we had a restart and they bunched all the cars up again. We had a…driver that….we’ve all had issues with. such as people give him axles and wheels/tires so he can finish the race..And he ends up taking people out of the race by intentionally wrecking them…Even people that give him parts to race. “Oh, well that’s Racing” NO..It’s NOT. There is a difference between driving around someone, nudging someone, pushing someone and then blatantly wrecking someone. When you’re outside in a turn, and the driver under him even moves DOWN to let him by..He generally will intentionally come DOWN on top of you to wreck you.
Well he did that to us TWICE last night. He folded a wheel nearly in half, because he came down on us instead of just going past. Sent our car to the pits, we got the wheel changed and her back out within a lap or 2. Well he DOES IT AGAIN on the last lap and she pits before the finish line…So we got a DNF…so less points for not actually finishing the race. plus now we’ve got to put more money in the car…He bent the k-frame, radius arm…and probably more we couldn’t see last night. Plus two wheels and tires.
He could EASILY go around people and give them a second or third place win…Rather than giving t hem a last position and/or a DNF…
I was PISSED…I won’t say what happened in the pits after the race, but I’m STILL raging about him. But you’ve got those kinda drivers in all classes everywhere. He’s young and stupid. He could have let us have a first or second place win and he’d STILL be in first place with points. Now we might get bumped to fourth. He’s won almost every race this year with his cheating ways. His whole car is illegal in our class. He knows he’s not the fastest car out there anymore. We pull away from him in the straights, but our driver, she still needs to work on her turns a bit more, she loses a bit of lead in the turns, but drags people behind her in the straights. So if he can’t beat us, wreck us…I guess.
Anyhow..I’ve got a video I shot on my phone I’ll link here for you guys. but I gotta head out this morning to the junkyards to get parts for my new VW Rabbit pickup project. C ya’ll!
Here is a crappy, short clip of a lap from August 14, 2015. Lap…10 or so when our 23 car went from second to first as the 44 car lost a tire.
A caution came out for the 44 car, that re-stacked the field. And the 16 car (black Escort with red lettering/numbers) Intentionally took us out in turn 2 on the restart.
[video]http://www.youtube.com/watch?v=5nv9Vbdj0_o[/video]
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