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#1
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Ocassionally check engine light comes on engine runs bad
I have a '93 with 123k miles and ocassionally my check engine light comes on and the car idles bad. If I'm at a stop with the car in drive or park it will idle bad and cut off. Then in about 30 seconds it will stop and the check engine light goes off.
I've had the Mass Flow cleaned as well as my IAv and the problem still remains. Anyone know what can it be??? |
#2
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Re: Ocassionally check engine light comes on engine runs bad
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'94 Laguna Blue LSi ~159k.......JDM ultra short-geared 3.900 STi Version 7 6-speed w/ Cobb shortshifter, ECUtune 244,8.1mm/256,9.1mm i/e cams, group N motor mounts, '97 grille, JDM clear corners, Momo JDM Legacy GT steering wheel, apkarian's LED tails, silver STi BBS wheels, PWR radiator, redstuff pads f/r, drilled/slotted rotors, bontragerworks rsb #18, Koni/GC 450f/375r coilovers, Megan Racing adjustable lateral links, KMac c/c plates, Stebro exhaust, ECUtune 1v5, Optima battery in the trunk where it belongs. Turbo project '97 Ebony LSi ~137k #036.......Power mode mod, JDM clear corners, BBS wheels. AUX/pocket mod Now a mod "over there" ............Photo album |
#3
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Re: Ocassionally check engine light comes on engine runs bad
As he said, check the code(s) and report back to us with what you find.
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2009 Volvo C70 T5 2008 Volvo S80 V8 2006 Range Rover Sport 2001 Audi S8 |
#4
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Re: Ocassionally check engine light comes on engine runs bad
MAF?...smells like it!
Keith |
#5
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Re: Ocassionally check engine light comes on engine runs bad
Thanks for the guide, I'm on it and will respond back today.
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#6
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Re: Ocassionally check engine light comes on engine runs bad
Checked on the price of a MAF...over $200. Does anyone know of a cheaper price.
Also, cleaned the MAF again, changed the fuel filter and then did the Seafoam process...AND this car is running like brand new. What a PUNCH when you floor it. BUT the check engine light still comes on and it runs bad. Last edited by Ankh599; 04-14-2012 at 11:04 PM. |
#7
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Re: Ocassionally check engine light comes on engine runs bad
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Also, it is highly possible that the solder joints in the MAF have gone bad. Many people have had success opening them up and resoldering. The other option is to buy a used MAF typically. Or fork out the money for a new one. Last edited by 1986nate; 04-14-2012 at 11:40 PM. |
#8
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Re: Ocassionally check engine light comes on engine runs bad
Just found out how and checked the codes.
32 - O2 Sensor RH 31 - Throttle Sensor (Been Changed) 37 - O2 Sensor LH 24 - By Pass Air Control Solenoid Valve 23 - Air Flow Sensor Looks like I'm spending a good part of my day under the hood. Hopefully one of these is likely the issue. Then I can concentrate on the 5 speed swap. |
#9
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Re: Ocassionally check engine light comes on engine runs bad
Start with the lowest number code first, replace/fix and clear the codes. You may want to also think about clearing the codes as they could be stored from the past. Then wait for the light to come on again and recheck.
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#10
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Re: Ocassionally check engine light comes on engine runs bad
Check all your vacuum hoses for disconnections or cracks.
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Father of 5 sons and 1 daughter Subaru SVX for fun Hyundai Veracruz for the wife. Susuki SX4 for my older son Ford Ranger for work Mercedes Benz Sprinter for vacation trips, EZ GO Golf cart for driving kids around gated community. |
#11
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Re: Ocassionally check engine light comes on engine runs bad
It was the Mass Air Flow Sensor. Yeah, but now the damn thing cuts off when you put it in gear. My dad said back in the day it was the pollution pump, now if your car does that it's the O2 Sensor. Which my car showed were bad. So I'm trying that next.
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#12
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Re: Ocassionally check engine light comes on engine runs bad
you may want to do more checking before you run out and replace the o2 sensors. if you have a voltmeter you can do quite a bit of checking to see what the car actually needs before replacing parts. did you replace the maf? is the new tps calibrated correctly? do the o2 sensors respond to a forced lean or rich condition?
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Current Stable: 1992 SVX 1979 K5 Blazer Cheyenne 1956 Plymouth Belvedere - Daisy 1967 Chevy C20 1953 Chevy 210 1969 Plymouth Satellite 1949 Chevy Thriftmaster 1959 Chevy Apache 1951 Chevy Stepside 1969 Chevy Camper Special 1978 Ford F150 w/ stroked 460 1986 Volvo 740 turbo wagon 1999 GMC 2500 Creep Van 1994 Impreza Outback |
#13
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Re: Ocassionally check engine light comes on engine runs bad
The MAF was definitely the problem. The new situation when I'm in drive or reverse and mash the brake the damn thing cuts off. Turns out it was the transmission. So my trans is completely gone!
But I was able to get all the '98 Legacy parts to do the swap to a 5 speed. Just waiting for them to arrive and my mechanic to come back from his honeymoon. |
#14
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Re: Ocassionally check engine light comes on engine runs bad
Can anyone tell me what colors the error diagnostic test plug uses?
I have a swapped car and need to run the diagnostic but the harness didn't' come with the plug, so I'm stuck using wires . |
#15
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Re: Ocassionally check engine light comes on engine runs bad
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