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rough idle, no revs
http://www.4g61t.org/forum/viewtopic.php?f=6&t=16796		 Page 1 of 2
Author:  stealthpony [ Mon Feb 20, 2006 7:28 pm ]
Post subject:  rough idle, no revs
I just finished my swap. 61T in my 91 colt. it idles rough and wont rev past about 5. try to drive it and it falls on its face. please help. oh yeh, props to my brother darkhorse for making my swap possible. thanks bro
Author:  MidwestDSM [ Mon Feb 20, 2006 9:28 pm ]
Post subject: 
is it getting fuel? I had a fuel pump go bad on me once and it did that.
Author:  Flying Eagle [ Tue Feb 21, 2006 10:49 pm ]
Post subject: 
Done the basic leak test to assure no boost leaks?
Author:  stealthpony [ Wed Feb 22, 2006 2:25 pm ]
Post subject: 
no boost leaks. I robbed a bunch of shit from my talon (fuel pump, piping, etc.) so I know I'm getting fuel.
Author:  MR HYDE [ Wed Feb 22, 2006 6:27 pm ]
Post subject:  Re: rough idle, no revs
Quote:
I just finished my swap. 61T in my 91 colt. it idles rough and wont rev past about 5. try to drive it and it falls on its face. please help. oh yeh, props to my brother darkhorse for making my swap possible. thanks bro
What ECU and what MAF are you using ?
Author:  The Ethereal [ Thu Feb 23, 2006 6:03 am ]
Post subject: 
Somehow I think it's either air flow related or an ignition issue.
Author:  DarkHorse [ Fri Feb 24, 2006 7:02 pm ]
Post subject: 
he is using a 89GT motor, harness, 90 DSM MAF and 89GT ECU...all my old swap goodies since I am no longer building a clone :twisted:

maybe I should loan him my 90DSM ECU...to go along with my 90 throttle body from my donor 4g63...and give him my Elantra front brakes to go with the GT rears...

some parts that I'd like to find still...KM210 (he is using the F5M22 from 1.8 eclipse) and turbo axles (good luck, I know)

do you think it could be the CAS?

I am WAY too nice

~joe
Author:  PaulMezz [ Fri Feb 24, 2006 10:27 pm ]
Post subject: 
Quote:
90 DSM MAF and 89GT ECU
Do those play well with each other? I thought they were different. AKA either go with a turbo CSM MAF or up the injectors to 450's and run a DSM ECU.
Author:  cdvma [ Sat Feb 25, 2006 12:12 pm ]
Post subject: 
Usually with a rev limit that isn't expected its due to bad ignition coils or bad spark plugs. Too much of a gap and not enough power to ignite it fast enough ect.
Author:  PaulMezz [ Sat Feb 25, 2006 5:11 pm ]
Post subject: 
Quote:
Usually with a rev limit that isn't expected its due to bad ignition coils or bad spark plugs. Too much of a gap and not enough power to ignite it fast enough ect.
Yeah, but I don't think the CSM MAF has the same output as the DSM one. The ECU is tuning for a DSM sensor but it is actually from a CSM one. That statement is totally valid IF you are using the correct sensors and whatnot. We have other factors here.

I am positive that info is on the site somewhere, but I'll leave that search up to the pony ;)
Author:  stealthpony [ Sat Mar 18, 2006 2:28 am ]
Post subject: 
thank you guys for all of your input. i did go with a dsm ecu and it solved all my problems. thanks again for the support and the info
Author:  FatBastard [ Sun Mar 19, 2006 7:50 am ]
Post subject: 
Stealthpony, I may be interested in that 61T ECU. I have another project in the making.
Author:  LyFeWoRx [ Sun Nov 23, 2008 5:54 pm ]
Post subject:  Re: rough idle, no revs
I think this is the same problem i'm having on one of my swaps. I have a dsm ecu, with a 61 mas. It revs up to like 1500 and falls on it's face. But I can unplug the maf and rev it up just fine.

I'm going to try a 1G maf now.
Author:  stealthpony [ Sun Nov 23, 2008 6:16 pm ]
Post subject:  Re: rough idle, no revs
How are you enjoying your new Mirage Mike
Author:  LyFeWoRx [ Sun Nov 23, 2008 8:18 pm ]
Post subject:  Re: rough idle, no revs
I'm actually selling it, since i got my summit running.
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