4g61t.org

Specializing in the 3g CSM
It is currently Sun Nov 17, 2019 5:57 pm

All times are UTC-05:00




Post new topic  Reply to topic  [ 8 posts ] 
Author Message
PostPosted: Mon May 13, 2019 11:32 pm 
Offline
Restricted Newbie

Joined: Mon May 13, 2019 11:23 pm
Posts: 4
My colt randomly has hesitation problems when accelerating, has no balls going up hills and this is causing bad gas mileage. Weird thing is its completely random. So days it will drive fine, other days it drives awful, some days in drives ok. I replaced the fuel pump, tried a different ecu, tried a different MAS, installed a new throttle position sensor, new fuel filter, checked the timing, all this and still runs the same. Also there is no check engine light. I'm thinking maybe a Knock sensor but I don't even think the engine has one. Any help would be nice, thank you.


Top
   
PostPosted: Tue May 14, 2019 2:17 am 
Offline
Moderator
User avatar

Joined: Wed Jan 04, 2006 1:21 pm
Posts: 2114
Location: Tucson Az
did u check the timing belt.. 1 tooth off will cause intermittent issues..


Steve

_________________
Steve 89 colt 2.3 stroker stock top end. evo3@20 psi 13.489@99.30mph 3/10 2012
On drag radials.auto trans.launching @ 5 psi and no traction thru 2nd.


Top
   
PostPosted: Wed May 15, 2019 1:08 am 
Offline
Restricted Newbie

Joined: Mon May 13, 2019 11:23 pm
Posts: 4
Yep, checked the timing. Also probably unrelated, but shes leaking a good amount of oil.


Top
   
PostPosted: Sat May 18, 2019 3:24 pm 
Offline
Some call me a god
User avatar

Joined: Sat Jul 07, 2007 10:40 pm
Posts: 1027
Location: Lyndhurst,VA
Quote:
Yep, checked the timing. Also probably unrelated, but shes leaking a good amount of oil.
It's a Mitsubishi so get used to that. :rolleyes:

Have you done the basics like plugs, wires, distributor cap, rotor button? I am assuming this is a 1.5 sohc GT car correct, if so no knock sensor.

_________________
Joey Santiago

2003 Lancer Evolution 57k original miles
1992 Montero LS
1989 Plymouth Colt GT (AWD project)
1989 Dodge Colt GT


Top
   
PostPosted: Sat May 18, 2019 11:14 pm 
Offline
Restricted Newbie

Joined: Mon May 13, 2019 11:23 pm
Posts: 4
Quote:
Quote:
Yep, checked the timing. Also probably unrelated, but shes leaking a good amount of oil.
It's a Mitsubishi so get used to that. :rolleyes:

Have you done the basics like plugs, wires, distributor cap, rotor button? I am assuming this is a 1.5 sohc GT car correct, if so no knock sensor.
Yes, sorry I forgot to mention that before, but I have replaced the wires, cap, and rotor. I haven't replaced the plugs yet because they look fine and aren't that old. Maybe I'll do that next. Also, yes. Its 1.5 sohc, thanks for confirming that it doesn't have a knock sensor. If its not the plugs, does anyone think it might be the distributor its self? I'm running out of options.


Top
   
PostPosted: Sun May 19, 2019 2:37 pm 
Offline
Some call me a god
User avatar

Joined: Sat Jul 07, 2007 10:40 pm
Posts: 1027
Location: Lyndhurst,VA
OBD1 especially in Mitsubishi's will run just awful without a CEL. Next area's I would address would be the O2 sensor and the coolant temp sensor. For sanities sake I would also do a health check on the engine and do a compression check and a leak down test.

_________________
Joey Santiago

2003 Lancer Evolution 57k original miles
1992 Montero LS
1989 Plymouth Colt GT (AWD project)
1989 Dodge Colt GT


Top
   
PostPosted: Tue Sep 17, 2019 6:42 pm 
Offline
Restricted Newbie

Joined: Mon May 13, 2019 11:23 pm
Posts: 4
Turned out it was just the ECU. Hard to believe both ecus I used before had the exact same problem. I bought a refurbished 1.8l ECU, paired it with bigger injectors, and maf sensor and it's running well now


Top
   
PostPosted: Mon Sep 23, 2019 9:11 am 
Offline
The Silent Administrator
User avatar

Joined: Wed Dec 24, 2003 3:32 pm
Posts: 9437
Location: Ottawa, ON, Canada
ECU's of this era are all due for rebuild if the capacitors are original or weren't caught in time to prevent other damages to the board that creep in after the fact - ie acid on traces/components.

Glad to hear you caught it!


Top
   
Display posts from previous:  Sort by  
Post new topic  Reply to topic  [ 8 posts ] 

All times are UTC-05:00


Who is online

Users browsing this forum: No registered users and 3 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  
cron
Powered by phpBB® Forum Software © phpBB Limited