Lean Misfire?

ZIELINSKI · 12-25-2007, 06:27 AM

I have been told that my MR2 has a 'lean Misfire'...
It pretty much has a mis at all RPM.. So any ideas as to what Caused this Misfire? And any Solutions?

Iam getting it Dyno Tuned and Injectors cleaned on the 2nd..

What about Is there anything i can do to get alittle more out of it..? Like adjusting the Airflow Meter Etc...?

Z

Ben · 12-25-2007, 01:28 PM

Start off with a tune up. Replace your spark plugs, wires, distributor cap, and rotor.

Jaicvc · 12-25-2007, 02:21 PM

^+1...
and timing belt too...

ZIELINSKI · 12-25-2007, 06:36 PM

And timing belt to you say?... Ohk then will Any 4AGE belt do, (like corolla) OR do i have to get a MR2 one?

E T Haggis · 12-26-2007, 12:26 PM

should be just any 4age timing belt. tell us how it goes when you do this and tell us it it helped any maby its somthing else you never know

ZIELINSKI · 12-26-2007, 06:04 PM

Thank You very much.. Ill certainly post how it goes

Mista 2 · 12-28-2007, 03:42 AM

what i would do first is have the engine running and pull off one spark plug lead at a time. if the car stalls or runs even rougher when you pull the lead off then its not the plug, lead, cap, injector at that cyl. if it runs the same then i would change the plugs from one cyl to another and see if it is the same cyl, have a look at the lead ( run the car at night in as dark place as you can), the dizzy/rotor at that point and the plugs. hopfully its one of those as they are easy to fix. anything else is a bit over my head, sorry

ZIELINSKI · 12-28-2007, 04:39 PM

OK i went out to the shed and Started the car... Was abit rough at first (but i havent started it for 3-4weeks) the things went out.. So i pulled off one lead at a time, The Car ran rougher each time i pulled a lead off.

Could this maybe be cause from the Injectors never been cleaned? (i suspect they have never been cleaned..)

Thank you for your feedback.. While this is frustrating me, Its enjoyable to learn and pick a few things up

MX450248 · 12-28-2007, 05:37 PM

how many miles r on the car? what year is it? when was the last time you put gas in it? does it still miss when the engine is up to operating temp?

ZIELINSKI · 12-28-2007, 05:40 PM

It had 98000km's (dont know that in miles) on it when i got it.. But now the clock says 280000km's.. suspected tampering... And its a 1987 model.

ZIELINSKI · 12-28-2007, 05:52 PM

Hmmm Yes it still has a miss in it when its up to temp...

I have put fuel in it from a few different places.. And it still misses..

Is there anyway i can get a recording and put on here?

Hmm youtube link perhaps?!

I might do that now..

MX450248 · 12-28-2007, 05:56 PM

I was going down the bad gas route. If I could hear it it might help a little more. Does the engine thro a code?

ZIELINSKI · 12-28-2007, 06:03 PM

Sorry you will have to explain what does. "Does the Engine thro a code" mean?

And i got a quick video but i dont know if its much help.. Iam uploading it now..

ZIELINSKI · 12-28-2007, 06:14 PM

http://www.youtube.com/watch?v=_b3edGuw3Xg

There is a link to the video i have taken.. At the end of the video.. You can hear it alittle...

Mista 2 · 12-29-2007, 03:44 AM

the code he is talking about is from joining te1 and t1 from the diagnostics post. your engine check light will flash. what are you playing with towards the start of the video that makes the engine rev higher? by pulling the leads off one at a time you can now say it isnt anything with only one cyl. what fuel do you run it on? what RPM does it start at?

ZIELINSKI · 12-29-2007, 06:48 AM

Umm.. I think its just the thing coming off the throttle body. I run the car on 98Octane Fuel. It happens at pretty much all RPM's. And no Engine warning lights come on at anytime...

And whats this diagnostics Post? And T1 and Te1?

MX450248 · 12-31-2007, 02:57 PM

What I meant was does the check engine light come on? Cause if it does, then like Mista 2 said, you can jump T1 and Te1 in the diagnostics port in the engine bay (at least thats where it is in my 93 turbo). It says "Diagnostics" on the cover. At this point, you really need a BGB to go any further, it will tell you what the check engine flashes mean and when the problem is.

Im not sure but could the fact that he is running 98 octane fuel in the car be a problem guys?

Mista 2 · 01-01-2008, 02:18 AM

the engine check light doesnt need to come on the have problems that running a diagnostic will pick up. the "port" is a little black box on the passanger side of the car at the back of the engine bay. mine is near where the engine cover prop hooks under when not being used. its about 2 inches by 1 inch. if you PM me your mobile number i'll take a photo of mine and send it to you.

who's 98 octane do you use?

ZIELINSKI · 01-01-2008, 07:30 AM

I use Shell..

And its getting HOPEFULLY fixed tomorrow so yer.. Wish me luck...lol And thank you all for your help..

MX450248 · 01-02-2008, 11:53 PM

you can get 98 octane at the pump?! Im movin to australia.

12-25-2007, 06:27 AM	#1 (permalink)
ZIELINSKI Ready to Learn Join Date: Apr 2007 Location: NSW, Australia Posts: 198 Thanks: 3 Thanked 3 Times in 3 Posts iTrader Rating: (0/0% )	Lean Misfire? I have been told that my MR2 has a 'lean Misfire'... It pretty much has a mis at all RPM.. So any ideas as to what Caused this Misfire? And any Solutions? Iam getting it Dyno Tuned and Injectors cleaned on the 2nd.. What about Is there anything i can do to get alittle more out of it..? Like adjusting the Airflow Meter Etc...? Z

12-28-2007, 05:40 PM	#10 (permalink)
ZIELINSKI Ready to Learn Join Date: Apr 2007 Location: NSW, Australia Posts: 198 Thanks: 3 Thanked 3 Times in 3 Posts iTrader Rating: (0/0% )	It had 98000km's (dont know that in miles) on it when i got it.. But now the clock says 280000km's.. suspected tampering... And its a 1987 model. Last edited by ZIELINSKI; 12-28-2007 at 05:49 PM..

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

12-25-2007, 01:28 PM	#2 (permalink)
Ben Same In The End Join Date: Aug 2006 Location: Oceanside, CA / Reno, NV Posts: 4,274 Thanks: 20 Thanked 309 Times in 284 Posts My Google Map iTrader Rating: (16/100% )	Start off with a tune up. Replace your spark plugs, wires, distributor cap, and rotor.

12-25-2007, 02:21 PM	#3 (permalink)
Jaicvc Banned Join Date: Mar 2006 Location: Frisco Posts: 778 Thanks: 1 Thanked 29 Times in 28 Posts iTrader Rating: (1/100% )	^+1... and timing belt too...

12-25-2007, 06:36 PM	#4 (permalink)
ZIELINSKI Ready to Learn Join Date: Apr 2007 Location: NSW, Australia Posts: 198 Thanks: 3 Thanked 3 Times in 3 Posts iTrader Rating: (0/0% )	And timing belt to you say?... Ohk then will Any 4AGE belt do, (like corolla) OR do i have to get a MR2 one?

12-26-2007, 12:26 PM	#5 (permalink)
E T Haggis I Like Rusty Spoons Join Date: Nov 2007 Location: Deland Posts: 585 Thanks: 61 Thanked 9 Times in 9 Posts iTrader Rating: (0/0% )	should be just any 4age timing belt. tell us how it goes when you do this and tell us it it helped any maby its somthing else you never know

12-26-2007, 06:04 PM	#6 (permalink)
ZIELINSKI Ready to Learn Join Date: Apr 2007 Location: NSW, Australia Posts: 198 Thanks: 3 Thanked 3 Times in 3 Posts iTrader Rating: (0/0% )	Thank You very much.. Ill certainly post how it goes

12-28-2007, 03:42 AM	#7 (permalink)
Mista 2 Cage Fighter Join Date: Nov 2006 Location: Adelaide, Australia Posts: 463 Thanks: 16 Thanked 21 Times in 21 Posts My Google Map iTrader Rating: (0/0% )	what i would do first is have the engine running and pull off one spark plug lead at a time. if the car stalls or runs even rougher when you pull the lead off then its not the plug, lead, cap, injector at that cyl. if it runs the same then i would change the plugs from one cyl to another and see if it is the same cyl, have a look at the lead ( run the car at night in as dark place as you can), the dizzy/rotor at that point and the plugs. hopfully its one of those as they are easy to fix. anything else is a bit over my head, sorry

12-28-2007, 04:39 PM	#8 (permalink)
ZIELINSKI Ready to Learn Join Date: Apr 2007 Location: NSW, Australia Posts: 198 Thanks: 3 Thanked 3 Times in 3 Posts iTrader Rating: (0/0% )	OK i went out to the shed and Started the car... Was abit rough at first (but i havent started it for 3-4weeks) the things went out.. So i pulled off one lead at a time, The Car ran rougher each time i pulled a lead off. Could this maybe be cause from the Injectors never been cleaned? (i suspect they have never been cleaned..) Thank you for your feedback.. While this is frustrating me, Its enjoyable to learn and pick a few things up

12-28-2007, 05:37 PM	#9 (permalink)
MX450248 Your Resident Welder Join Date: Nov 2006 Location: Maumee, OH Posts: 530 Thanks: 22 Thanked 21 Times in 19 Posts My Google Map iTrader Rating: (1/100% )	how many miles r on the car? what year is it? when was the last time you put gas in it? does it still miss when the engine is up to operating temp?

12-28-2007, 05:52 PM	#11 (permalink)
ZIELINSKI Ready to Learn Join Date: Apr 2007 Location: NSW, Australia Posts: 198 Thanks: 3 Thanked 3 Times in 3 Posts iTrader Rating: (0/0% )	Hmmm Yes it still has a miss in it when its up to temp... I have put fuel in it from a few different places.. And it still misses.. Is there anyway i can get a recording and put on here? Hmm youtube link perhaps?! I might do that now..

12-28-2007, 05:56 PM	#12 (permalink)
MX450248 Your Resident Welder Join Date: Nov 2006 Location: Maumee, OH Posts: 530 Thanks: 22 Thanked 21 Times in 19 Posts My Google Map iTrader Rating: (1/100% )	I was going down the bad gas route. If I could hear it it might help a little more. Does the engine thro a code?

12-28-2007, 06:03 PM	#13 (permalink)
ZIELINSKI Ready to Learn Join Date: Apr 2007 Location: NSW, Australia Posts: 198 Thanks: 3 Thanked 3 Times in 3 Posts iTrader Rating: (0/0% )	Sorry you will have to explain what does. "Does the Engine thro a code" mean? And i got a quick video but i dont know if its much help.. Iam uploading it now..

12-29-2007, 03:44 AM	#15 (permalink)
Mista 2 Cage Fighter Join Date: Nov 2006 Location: Adelaide, Australia Posts: 463 Thanks: 16 Thanked 21 Times in 21 Posts My Google Map iTrader Rating: (0/0% )	the code he is talking about is from joining te1 and t1 from the diagnostics post. your engine check light will flash. what are you playing with towards the start of the video that makes the engine rev higher? by pulling the leads off one at a time you can now say it isnt anything with only one cyl. what fuel do you run it on? what RPM does it start at?

12-29-2007, 06:48 AM	#16 (permalink)
ZIELINSKI Ready to Learn Join Date: Apr 2007 Location: NSW, Australia Posts: 198 Thanks: 3 Thanked 3 Times in 3 Posts iTrader Rating: (0/0% )	Umm.. I think its just the thing coming off the throttle body. I run the car on 98Octane Fuel. It happens at pretty much all RPM's. And no Engine warning lights come on at anytime... And whats this diagnostics Post? And T1 and Te1?

12-31-2007, 02:57 PM	#17 (permalink)
MX450248 Your Resident Welder Join Date: Nov 2006 Location: Maumee, OH Posts: 530 Thanks: 22 Thanked 21 Times in 19 Posts My Google Map iTrader Rating: (1/100% )	What I meant was does the check engine light come on? Cause if it does, then like Mista 2 said, you can jump T1 and Te1 in the diagnostics port in the engine bay (at least thats where it is in my 93 turbo). It says "Diagnostics" on the cover. At this point, you really need a BGB to go any further, it will tell you what the check engine flashes mean and when the problem is. Im not sure but could the fact that he is running 98 octane fuel in the car be a problem guys?

01-01-2008, 02:18 AM	#18 (permalink)
Mista 2 Cage Fighter Join Date: Nov 2006 Location: Adelaide, Australia Posts: 463 Thanks: 16 Thanked 21 Times in 21 Posts My Google Map iTrader Rating: (0/0% )	the engine check light doesnt need to come on the have problems that running a diagnostic will pick up. the "port" is a little black box on the passanger side of the car at the back of the engine bay. mine is near where the engine cover prop hooks under when not being used. its about 2 inches by 1 inch. if you PM me your mobile number i'll take a photo of mine and send it to you. who's 98 octane do you use?

01-01-2008, 07:30 AM	#19 (permalink)
ZIELINSKI Ready to Learn Join Date: Apr 2007 Location: NSW, Australia Posts: 198 Thanks: 3 Thanked 3 Times in 3 Posts iTrader Rating: (0/0% )	I use Shell.. And its getting HOPEFULLY fixed tomorrow so yer.. Wish me luck...lol And thank you all for your help..

01-02-2008, 11:53 PM	#20 (permalink)
MX450248 Your Resident Welder Join Date: Nov 2006 Location: Maumee, OH Posts: 530 Thanks: 22 Thanked 21 Times in 19 Posts My Google Map iTrader Rating: (1/100% )	you can get 98 octane at the pump?! Im movin to australia.