|
|
Post by dickyh on Nov 2, 2015 12:16:56 GMT -5
thats very nice of them to stand up and send you a new one,,,,,the mark of a good company yes, i agree... technically it is under warranty. if i had to buy a new one i would have probably opted to put on a carb. |
|
|
|
Post by rockynv on Nov 3, 2015 13:29:08 GMT -5
Yep ECU not reading correctly however an exhaust leak will throw off the Lambda sensor too making the ECU think its running lean. You may see a drop in fuel economy when there is an exhaust leak causing a false lean reading.
|
|
|
|
Post by hillbillybob on Nov 3, 2015 18:03:27 GMT -5
dickyh ........ There are 626 places in Florida, that sell ethanol free gas. So you don't have to burn a 10% blend if you don't want to. Gotta be something near you. Pure Gas
|
|
|
|
Post by dickyh on Nov 3, 2015 18:09:47 GMT -5
dickyh ........ There are 626 places in Florida, that sell ethanol free gas. So you don't have to burn a 10% blend if you don't want to. Gotta be something near you. Pure Gas there are 6 places, but none directly by me so it makes it difficult having only a one gallon fuel tank. and most are marinas which have limited hours... I looked into this when i first got the scoot and a couple places that advertised i found where not accurate. |
|
|
|
Post by dickyh on Nov 3, 2015 18:19:05 GMT -5
Yep ECU not reading correctly however an exhaust leak will throw off the Lambda sensor too making the ECU think its running lean. You may see a drop in fuel economy when there is an exhaust leak causing a false lean reading. I'm sure an exhaust leak has something to do with this as well. I have always seemed to have a problem with the "performance exhaust" since putting it on. and the only reason i did was because I could not find a oem muffler. I've searched high and low but having to buy everything online for the most part makes matters worse because you order something thinking it will fit and it doesn't. I have a local mechanic looking into it for me to see if I can find one. I have a retro style scooter with rear drum brake and everything seems to be for a sports style which angles up. In the mean time, I'm going to try and use some red gasket silicone and see if it makes a difference. I've tried the wafer type and the ring type gasket and can't seem to get it to really seal. I've changed the studs to doubling up on the gaskets and nothing seems to make a difference. I'm afraid to go too tight in fear of breaking off the studs. I even took it to a muffler shop and it came loose after about a week. |
|
|
|
Post by dickyh on Nov 3, 2015 18:33:57 GMT -5
Ok, so this may be a bit off topic, but I'm am totally confused on this RICH/LEAN thing... I thought that lean meant more air and less gas and Rich was the opposite. And setting the idle screw to the correct RPM. I've had some say higher rpm the better and others say the exact opposite. while i know it has nothing to do with the fuel injection on throttle, i would really like to know what the correct idle rpm is supposed to be once the engine is warmed up.
With the EFI after the engine warms up the idle seems to rise by about 200-300 from startup so taking that into consideration what should my idle be? 1500 RPM when warm, higher or lower? I have it set to 1560 and it runs GOOD but not what I would call optimum.
AS for the rest I just the the EFI take care of it, because all of those numbers and calculations make no sense to me.(never been a wiz at math) I do think with the performance exhaust however, I should be running it a bit leaner by my understanding (less fuel- more air) as coming off of higher throttle is pops occasionally.
|
|
|
|
Post by rockynv on Nov 4, 2015 0:28:02 GMT -5
When you have an exhaust leak it causes the computer to think its running lean and the EFI then tries to compensate adding more fuel by keeping the injector open longer leading to excess fuel in the exhaust however the valves also need to be adjusted properly because if they are a tad too tight then they will open too soon adding to the problem. The EFI won't be able to calibrate itself unless the exhaust header is sealed with no leaks.
Parts for Scooters is local to me in nearby St Pete and would be my GoTo guys for a decent exhaust. Matt does a pretty good job ensuring that things are taken care of and sets a pretty high bar for all his people to match.
|
|
|
|
Post by dickyh on Nov 4, 2015 5:54:38 GMT -5
When you have an exhaust leak it causes the computer to think its running lean and the EFI then tries to compensate adding more fuel by keeping the injector open longer leading to excess fuel in the exhaust however the valves also need to be adjusted properly because if they are a tad too tight then they will open too soon adding to the problem. The EFI won't be able to calibrate itself unless the exhaust header is sealed with no leaks. Parts for Scooters is local to me in nearby St Pete and would be my GoTo guys for a decent exhaust. Matt does a pretty good job ensuring that things are taken care of and sets a pretty high bar for all his people to match. Thanks... I buy 98% of my parts from them. I actually got the performance exhaust from them. However, they do not seem to sell the stock style exhaust I need, thus is why I bought the one I have now. I've looked high and low online and can't seem to find the one I need. Parts for scooters sell one that is for a zen150 but I can't tell if it will fit as they don't give many details about it. I paid 150.00 for the exhaust from them and would really like to keep it as I like the sound, but I have no experience in EFI and don't have a clue of if I should or how to program it for the bigger exhaust. On another note, is there a way to tell if it is actually leaking? As mechanic says to cover the muffler with a rag and listen for it, but it seems risky by blocking off the exhaust. and I don;t know what I'm listening for. |
|
|
|
Post by rcq92130 on Nov 4, 2015 12:42:11 GMT -5
When you have an exhaust leak it causes the computer to think its running lean and the EFI then tries to compensate adding more fuel by keeping the injector open longer leading to excess fuel in the exhaust however the valves also need to be adjusted properly because if they are a tad too tight then they will open too soon adding to the problem. The EFI won't be able to calibrate itself unless the exhaust header is sealed with no leaks. Parts for Scooters is local to me in nearby St Pete and would be my GoTo guys for a decent exhaust. Matt does a pretty good job ensuring that things are taken care of and sets a pretty high bar for all his people to match. Thanks... I buy 98% of my parts from them. I actually got the performance exhaust from them. However, they do not seem to sell the stock style exhaust I need, thus is why I bought the one I have now. I've looked high and low online and can't seem to find the one I need. Parts for scooters sell one that is for a zen150 but I can't tell if it will fit as they don't give many details about it. I paid 150.00 for the exhaust from them and would really like to keep it as I like the sound, but I have no experience in EFI and don't have a clue of if I should or how to program it for the bigger exhaust. On another note, is there a way to tell if it is actually leaking? As mechanic says to cover the muffler with a rag and listen for it, but it seems risky by blocking off the exhaust. and I don;t know what I'm listening for. My recent experience with PartsForScooters was not so good. Had the engine hanger on my scoot break; ordered one from PFS. Their adv. said it was applicable to GY6 152/157 QMI/QMJ scooters. My BMS Heritage is just a standard version of using one of those very engines. Part came - didn't fit. OK, no problem - things happen. But I would have at least expected them to refund my money so it didn't cost me anything. After all - I relied on THEIR advertisement and did nothing wrong on my end. Requested a RMA and got one with the "reason for return" ~~~~ "customer error - customer ordered wrong part". So I've had to pay for return shipping and still do not know what kind of partial refund I'll be getting. I even bothered to call and discuss the issue, but the woman told me "that's our policy, nothing I can do". Not the kind of response i would expect when THEY screwed up. Think I'll stick with GY6RacingParts from now on. Even though they are in Puerto Rico, parts arrive here in San Diego in half the time, prices are better, and service is a little more responsible. |
|
|
|
Post by dickyh on Nov 8, 2015 10:06:45 GMT -5
So, to update... I received the new ECU Saturday and put it on the scooter. Wouldn't start. Added a little throttle to get it started and started blowing black smoke and was REALLY LOUD.Turned it off right away. I was so pissed off, I couldn't think straight. By now it was dark out, so couldn't do much and decided to wait till the morning.
A couple hours later, it dawned on me that they probably never programmed the ECU before they sent it out. So first thing this morning, I hooked up the laptop, ran the software and just as I thought it asked for the calibration file which I then burned to the ECU.
Scooter started right up, took it on the road as she is running like a banshee again! I was so close to pulling the EFI and putting on a carb...
Anyway, I am back on the road and wanted to thank all of you for your help in my engine saga. Would never have been able to pull it off without the help of the experienced people on here.
Next project down the road will be tearing the old engine apart(got to get a gear puller and that weird nut puller tool with the notches in it) and finding out what was making that horrific noise. (my guess the crankshaft bearings), but we'll see.
|
|
