Engine issues...

LinuxGold said:
I am using 1999 Honda HX using VTEC-E (three stages, economic mode on the first stage.) To me it might be a solenoid problem. I would recommend taking to auto repair store and have them perform OBDII check for ECU. That way you will know if ECU is operating properly before you consider anything else as a problem.
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There is already CLEAR post right there. No MIL then scan tool from Auto shop don't find anything at all. The factory scan tool from dealer can test hardware.
 
The Highlander said:
There is already CLEAR post right there. No MIL then scan tool from Auto shop don't find anything at all. The factory scan tool from dealer can test hardware.
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I am Electronics Technician. MIL might not light up because the part of ECU might be broken to a point that it failed to report as it should. I recommend a check up to be on the safe side.
 
LinuxGold said:
I am Electronics Technician. MIL might not light up because the part of ECU might be broken to a point that it failed to report as it should. I recommend a check up to be on the safe side.
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Depend on the people at the part stores who is knowledge of the scan tools that he/she can check trouble codes only but they are not know any thing about pending codes. Maybe their scan tools are basic and might not read the pending codes when the MIL is not turn on, like what The Highlander mentioned. My scan tool can read the pending codes no matter what the MIL is not turn on cuz I want to check the pending codes to see if they might affect the driveability problems or other emission relates. Dst
 
deafsmogtech said:
Depend on the people at the part stores who is knowledge of the scan tools that he/she can check trouble codes only but they are not know any thing about pending codes. Maybe their scan tools are basic and might not read the pending codes when the MIL is not turn on, like what The Highlander mentioned. My scan tool can read the pending codes no matter what the MIL is not turn on cuz I want to check the pending codes to see if they might affect the driveability problems or other emission relates. Dst
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Then go to Honda Dealer to have them check out.
 
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Well, this is kinda embarrassing. I found out its a 'safety' feature to prevent it going into vtec mode while being parked. I floored it from a standstill to the highway and it revved smoothly to the redline. Other members from civic forums have the same thing happened to their civics. So, it looks like its good to go. Thanks for the help, though.
 
LinuxGold said:
I am Electronics Technician. MIL might not light up because the part of ECU might be broken to a point that it failed to report as it should. I recommend a check up to be on the safe side.
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I don't care you are electronics technician or not. Whatever CODE come up and universal scan tool can't read or don't understand what pending code mean.

Only factory scan tool from dealer can read, write *overwrite/upgrade flash*, test (only skill or certified mechanic can do it)

Two days ago, Customer came and complained that his oil pressure gauge do not work and he want to estimates for oil pressure gauge. My guess was oil pressure gauge sensor or bad connection or PCM or oil pressure gauge so I grab factory scan tool and there is no pending codes found. I checked oil pressure gauge sensor got zero volt during engine running then I tested dashboard and all gauges were move even pressure gauge too thru scan tool. So I wrote down must be bad oil pressure sensor or bad connection. He don''t want to waiting for full diag.
 
sequoias said:
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Well, this is kinda embarrassing. I found out its a 'safety' feature to prevent it going into vtec mode while being parked. I floored it from a standstill to the highway and it revved smoothly to the redline. Other members from civic forums have the same thing happened to their civics. So, it looks like its good to go. Thanks for the help, though.
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No, nothing wrong w/ you. Like I say easy on the engine, not overrev motor in post #17
 
sequoias said:
Wirelessly posted (sent from a smartphone. )

Well, this is kinda embarrassing. I found out its a 'safety' feature to prevent it going into vtec mode while being parked. I floored it from a standstill to the highway and it revved smoothly to the redline. Other members from civic forums have the same thing happened to their civics. So, it looks like its good to go. Thanks for the help, though.
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Dont be embarrassing. You have learn new something today, Same like our old Ford Focus won't go high rev while being parked.
 
:lol: alright, then. I don't recall when it did that before...I must have forgotten that. Also, other thing when I bought my car in 2006, I noticed the transmission behavior and found out it's normal for it to do that. You can feel it "shift" to 5th gear which was actually the torque converter doing the job.
 
sequoias said:
:lol: alright, then. I don't recall when it did that before...I must have forgotten that. Also, other thing when I bought my car in 2006, I noticed the transmission behavior and found out it's normal for it to do that. You can feel it "shift" to 5th gear which was actually the torque converter doing the job.
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Called "Lock-Up Torque Converter Clutch", yeah it will lock up TCC during cruise like above 40 MPH. TCC will not operate when the engine is not warm up, also will disengage TCC when braking.
 
LinuxGold said:
I am Electronics Technician. MIL might not light up because the part of ECU might be broken to a point that it failed to report as it should. I recommend a check up to be on the safe side.
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Sorry , I didnt read your post, I now understand what you mean. Yes it will store trouble codes or pending codes in PCM (Powertrain Control Module same as ECM or ECU), even the MIL is not turn on. Good idea to take a car to the auto parts store to ask them to plug it to pull the codes. Tip: ask them for trouble AND pending codes. If they dont know anything, try another parts store.
On newer vehicles with CAN (Control Area Network) systems, if any out of range sensor(s) in the powertrain/emission, PCM will trigger the MIL as steady light till the tech fix it or clear the MIL by scan tool. If you dont fix it , just clear codes by a scan tool. It will come back again cuz You didnt fix the out of range sensor(s) in the systems...... how about gas cap that is not sensor? The PCM use fuel tank pressure sensor (mounted on the tank) to sense vacuum or pressure in the tank. If the gas cap loose, then tank will not hold vacuum or pressure that mean fuel vapor (HC= hydrocarbon) will spew to the atmosphere.
 
deafsmogtech said:
Called "Lock-Up Torque Converter Clutch", yeah it will lock up TCC during cruise like above 40 MPH. TCC will not operate when the engine is not warm up, also will disengage TCC when braking.
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Interesting...it usually does that at around 50-65 mph range depending on the engine load and rpm.
 
sequoias said:
Interesting...it usually does that at around 50-65 mph range depending on the engine load and rpm.
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yeah, you are right. During downshift, TCC will be disengage, you know that. You try to hold the gas pedal to maintain about 65 mph or follow the highway speed limit, try to blip or very little depress on the brake pedal with your left foot, to see how do the transmission shift to 3rd gear from 4th gear and watch a tachometer. You will see why the TCC function do act like unlock-up/ lock-up. TCC is not for manual transmission. Pls take easy on tranny and engine.
 
deafsmogtech said:
yeah, you are right. During downshift, TCC will be disengage, you know that. You try to hold the gas pedal to maintain about 65 mph or follow the highway speed limit, try to blip or very little depress on the brake pedal with your left foot, to see how do the transmission shift to 3rd gear from 4th gear and watch a tachometer. You will see why the TCC function do act like unlock-up/ lock-up. TCC is not for manual transmission. Pls take easy on tranny and engine.
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Don't forget about dual clutch transmission. DCTs and manual transmissions are better than auto transmission for smooth and less lag. I believe TCC is junk.
 
I bet this prevent engine from throwing out pistons while redline while parking.

Seriously, a friend of my brother's was messing with Hot Rod with 600hp engine, He was stupid enough to floor the throttle and let the engine go redlined and in 3 seconds. Engine blew up and piston ripped through firewall of car and it went deadly close to his face thus shattering his glasses. He was soo SCARED :eek3: It was back then nearly 30 years ago. My brother told me serious story and warned me not to floor the car while it's parked.

As for Honda or any 4 cylinders car, I doubt it'll blow the engine, but would damage valve, timing chain ect if go redlined too long while parked. Unless you experiment Honda with NOS turned on while parked :eek2:

Make sense?

Catty
 
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purplecatty said:
I bet this prevent engine from throwing out pistons while redline while parking.

Seriously, a friend of my brother's was messing with Hot Rod with 600hp engine, He was stupid enough to floor the throttle and let the engine go redlined and in 3 seconds. Engine blew up and piston ripped through firewall of car and it went deadly close to his face thus shattering his glasses. He was soo SCARED :eek3: It was back then nearly 30 years ago. My brother told me serious story and warned me not to floor the car while it's parked.

As for Honda or any 4 cylinders car, I doubt it'll blow the engine, but would damage valve, timing chain ect if go redlined too long while parked. Unless you experiment Honda with NOS turned on while parked :eek2:

Make sense?

Catty
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Yeah, I figured that out. No load-high engine speed=boom!

Funny thing, I saw a youtube video of someone redline a mazda rotary engine for about 6 minutes and it finally blew up and smoked up. Sturdy little engine there.
 
The Highlander said:
Don't forget about dual clutch transmission. DCTs and manual transmissions are better than auto transmission for smooth and less lag. I believe TCC is junk.
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I did read the DCT in Alldata, it's very complicate description of the DCT functions. I've not seen any DCT courses offer in community college. I wish my boss pay me to attend a BMW or MBZ factory training school to learn the DCT.
 
deafsmogtech said:
I did read the DCT in Alldata, it's very complicate description of the DCT functions. I've not seen any DCT courses offer in community college. I wish my boss pay me to attend a BMW or MBZ factory training school to learn the DCT.
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VW designed DCT then most companies copy it if I am correct. The 6 speeds DSG(Direct-shift gearbox) as dual clutch transmission is 30LB lighter than 4 speeds automatic transmission

Ford launching dual-clutch transmission in U.S. in 2010

Yep, My courses don't have DCT yet. Just learned how it work at manual transmission course but no lab. Oh well.
 
sequoias said:
Wirelessly posted (sent from a smartphone. )



Yeah, I figured that out. No load-high engine speed=boom!

Funny thing, I saw a youtube video of someone redline a mazda rotary engine for about 6 minutes and it finally blew up and smoked up. Sturdy little engine there.
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Yes, rotary engine is sturdy. That's why it can tolerate high rpm than conventional piston engine. Mazda RX7 and RX8 involves race and driver let engine go redline often on 1st and 2nd gear :lol: Rotary engine was also popular for now defunct Gocart ride (along with arcade games) back in 1980's cuz it is easy to maintain and lasts long. I rode on rotary powered gocart and it was smooth and responsive.

Catty
 
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