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91 Excel, 91 excel running rich,real rich

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helpmyhyundia View Member Profile	Feb 13 2005, 09:24 AM Post #1
Newbie Group: Members Posts: 2 Joined: 13-February 05 Member No.: 5,070 Status: Location: Calgary,Alberta Drives: 91 Hyundia Excel	I have a 91 Excel 1.5 multi port that is running very rich at idle. Have replaced injectors, air flow sensor,temp sesor and throttle position sensor. It has 133000km on the engine. What am i missing?

VALKYRIE YB70 View Member Profile	Feb 13 2005, 04:52 PM Post #2
Mod Emeritus Group: Members Posts: 1,221 Joined: 29-October 04 Member No.: 2,086 Status: Location: Cambridge, England Drives: Modified (180 b.h.p.) `95 Hyundai S-Coupe Turbo SE ....Sadly now sold & replaced with an `04 Alfa Romeo 156 2-litre Veloce! :-http://aol.photobox.co.uk/album/thumbnails.html?c_album=7089276&page=all	Hi!.......you could probably improve this by fitting a less restrictive intake instead of the stock airbox. Either a universal cone filter or a proper CAI should increase power a little & save fuel. I would also dismantle & clean the idle control actuator & it`s connector. Cheers, Nick. :)

duke View Member Profile	Feb 15 2005, 07:27 PM Post #3
Community Advisor Group: Community Advisor Posts: 1,830 Joined: 31-October 04 Member No.: 2,122 Status: Location: Holland Landing, Ontario, Canada Drives: 2007 NF Sonata 2.4L	your HD-dealer can easily check the O2-sensor operation. A faulty O2-sensor will cause a rich mixture. If that is the case, a fault code will be logged in the ECM.

gjaym View Member Profile	Feb 16 2005, 12:58 AM Post #4
Newbie Group: Members Posts: 3 Joined: 15-August 04 Member No.: 645 Status: Location: australia Drives: 1990 scoupe	also check ecu most of the mitsu based units have a problem with 3 caps on the circut board that go bad one of the caps deals with the injectors check this site http://www.tmo.com/howto/ecu1g/caps.htm

helpmyhyundia View Member Profile	Feb 17 2005, 03:38 PM Post #5
Newbie Group: Members Posts: 2 Joined: 13-February 05 Member No.: 5,070 Status: Location: Calgary,Alberta Drives: 91 Hyundia Excel	THANKS, THE ECU WAS THE PROBLEM-RUNS LIKE A DREAM

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