3.4L with 1st Gen SC High Idle and No top end power
07-08-2009, 05:54 PM
#61
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alright boys and girls....i took both o2 sensors off and sure enough they do have part numbers on them. Front Part Number is 89465-35360 and Rear Part Number is 89465-35530 both are denso factory toyota. Here is a pic....the left is the front and the right is the rear.
i also did a test run with my BR-3 and recorded it so you guys can see all the info in realtime.....please dont laugh that over a 30 second video and i still never made it to 70 mph and this was WIDE THE F OPEN throttle......and yes this was a flat road and no i was not pulling a bus.....
[YOUTUBE]http://www.youtube.com/watch?v=Fj_nHl1hyeE[/YOUTUBE]
any ideas? anyone? bueller? im really wanna cry....i have this sick 3.4 swap with a charger and im almost slower than when i have the 3.0...
i also did a test run with my BR-3 and recorded it so you guys can see all the info in realtime.....please dont laugh that over a 30 second video and i still never made it to 70 mph and this was WIDE THE F OPEN throttle......and yes this was a flat road and no i was not pulling a bus.....
[YOUTUBE]http://www.youtube.com/watch?v=Fj_nHl1hyeE[/YOUTUBE]
any ideas? anyone? bueller? im really wanna cry....i have this sick 3.4 swap with a charger and im almost slower than when i have the 3.0...
Last edited by b18vteceg; 07-08-2009 at 05:55 PM.
07-08-2009, 06:38 PM
#62
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I Like I said, I dont really know what it will do if it has the wrong one. But I figure its as good a place to look as any at this point.
I definitely think you need fuel mods.
I definitely think you need fuel mods.
07-08-2009, 08:43 PM
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07-09-2009, 09:34 AM
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Your MAF is also reporting correctly to the ECU, mine also reports 74.9% at WOT. One thing that stikes me odd about your readings is the Long term fuel Trim. I don't or can't remember mine changing values that fast on the fly just the short term fuel trims. I thought the long term was an average reading over a time frame.
Also can someone run on test on their rig and tell me if their MAF is showing more than 11lb/min when at full throttle up to say 70 miles per hour?
I dunno but 11lb/min seems pretty low to me....especially for a charged motor
Last edited by b18vteceg; 07-09-2009 at 09:36 AM.
07-09-2009, 07:28 PM
#66
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OK there, in 1999 toyota started using AFR sensors, NOT o2 sensors, and they are NOT COMPATIBLE WITH EACH OTHER. (this being the front sensor).
I would go to URD and get the correct front sensor and possibly the rear as well before you start screwing with anything else.
http://www.urdusa.com/index.php?cPat...484vtqvh7f9147
It may not be your only problem, but it is part of it, if you have the 98 sensor in the front.
I would go to URD and get the correct front sensor and possibly the rear as well before you start screwing with anything else.
http://www.urdusa.com/index.php?cPat...484vtqvh7f9147
It may not be your only problem, but it is part of it, if you have the 98 sensor in the front.
Last edited by Greg_Canada; 07-09-2009 at 07:32 PM.
07-10-2009, 06:04 AM
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ill call toyota today and check those part numbers and see exactly what they came from.....but i find it hard to believe i wouldnt be getting alot of codes being thrown at me if i had the incorrect sensor.....but at this point im open to anything....
07-10-2009, 02:32 PM
#69
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Your ECU would not have used the feedback from the OXY sensors at WOT in open loop.
I also think you are correct that if you had the wrong type of sensor oxy/AFR connected you would have a CEL.
Whats left, The fuel pump?
I also think you are correct that if you had the wrong type of sensor oxy/AFR connected you would have a CEL.
Whats left, The fuel pump?
07-10-2009, 03:39 PM
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alright so i went and talked to toyota and a master tech there that has a sc 3.4 in his 85 truck.
after 90 mins of going over the BR-3 video and everything i have already done and checking part numbers and basically everything.
the ecu i have asks for o2 sensors not the af sensor so i am correct on the sensors and everything pans out there. after going over everything they said the only thing left is your fuel pump. so i have the 3.4 pump in my garage so tomorrow ill put it in and see if there is a difference. i know i should put the walbro in but honestly why spend the money on a walbro when i have the pump in my garage and to be honest this isnt a race motor i dont need 200,000 psi (i know a little high but i made my point
) so ill get back to you guys tomorrow. but as of now according to literally everyone at toyota and on here.....everything looks fine except fuel......so out comes the pump.....
after 90 mins of going over the BR-3 video and everything i have already done and checking part numbers and basically everything.
the ecu i have asks for o2 sensors not the af sensor so i am correct on the sensors and everything pans out there. after going over everything they said the only thing left is your fuel pump. so i have the 3.4 pump in my garage so tomorrow ill put it in and see if there is a difference. i know i should put the walbro in but honestly why spend the money on a walbro when i have the pump in my garage and to be honest this isnt a race motor i dont need 200,000 psi (i know a little high but i made my point
) so ill get back to you guys tomorrow. but as of now according to literally everyone at toyota and on here.....everything looks fine except fuel......so out comes the pump.....
07-11-2009, 07:37 AM
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Just an obvious reminder. If you think you have had increased EGT's from running lean, I would take a look at my catalytic converter. Wouldn't want to find out the core had melted, causing some blockage.
07-11-2009, 03:24 PM
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no change....insteresting thing was....the pumps looked the same size and everything....i thought i remember seeing a post where someone has a pic of both and there was a huge difference but i couldnt find it....regardless i swapped pumps and it runs just the same....not one difference....
im gonna go cry in the corner now....
im gonna go cry in the corner now....
07-13-2009, 09:37 AM
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Dont give up yet!
It sounds like you arent sure the new fuel pump is any bigger than the old one. So its possible nothing has really changed. But while were on the subject of fuel, have you changed the filter? A clogged fuel filter might explain it, and its a cheap and easy item to swap.
It sounds like you arent sure the new fuel pump is any bigger than the old one. So its possible nothing has really changed. But while were on the subject of fuel, have you changed the filter? A clogged fuel filter might explain it, and its a cheap and easy item to swap.
07-13-2009, 12:26 PM
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confirmed with toyota the physical size of the pumps are the same but they are rated for different amounts. so pump was correct and didnt fix the problem. yes filter has been changed.
im gonna try another set of coil packs i have.
and then gonna try and check fuel pressure. (stupid banjo fittings)
im gonna try another set of coil packs i have.
and then gonna try and check fuel pressure. (stupid banjo fittings)
07-13-2009, 07:31 PM
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so I replaced the fuel filter again and put a new set of coil packs on the motor....still no difference....
so now i am thinkin maybe a timing issue?....wondering if maybe i skipped a tooth on a cam gear or maybe a crank gear.....so im gonna pull covers just to verify my timing marks....
so now i am thinkin maybe a timing issue?....wondering if maybe i skipped a tooth on a cam gear or maybe a crank gear.....so im gonna pull covers just to verify my timing marks....
