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happened to me also... follow these thread - http://www.toyotavantech.com/forum/content.php?229-Re-Ignition-switch-question

- let me tell you my story, your problem also happened to me, checked...

is gas type better than the fluid type shocks?

ok i will check all of that... thank you very much... i'll update as soon as i have my time again

yes i have good plugs, wires, cap and rotor. good O2 sensors. clean air filter. i don't have any codes recorded at ecu. what else sir?

guys sorry for the late response, i've checked the three sensors on the rad, following the steps on the manaul, they are in good condition. what could else be the problem? as of now, the rough idling...

after a thorough check of the big hose, no cracks found at any part of it. i did the squeeze test that you told me sir tim , the idling stayed fine only rpm drop happened. Hi sir RawbSpear, good...

thank you sir tim. i'll try to thoroughly check again that hose. i'll update as soon as i'm finished checking

thank you very much sir for that video but no, van doesn't run like that, as long its in nuetral or park, idles fine as soon as you put gear into drive, idling becomes rough. the engine still runs...

no, van doesn't sputter nor cough. as you accelerate the rough idling fades away and then as you stop while still at drive gear, idling rough again. what do you think sir? what and where should i...

checked all air and vaccum hoses, no leaking found. what else could be the problem? any suggestions TVT's?

thanks for the reply sir. i'll go check it out. i'll update the outcome

hello guys, its been a while since the last time i'm at this site... need a little help from the TVT pros with my van. In park or neutral gear, idles fine but when put into drive, idling becomes...

-thanks guys for the infos and reminders. i'm not just looking at the alternator's effeciency, i'm also looking at the engine's effeciency. studying our van's engine, it runs effeciently at 700-750...

- thank you sir Tim for a reminder. i'm just trying to imitate the newer A/T s of toyota, studying how the toyota's ECT works, it could be applied to the van. innovating and trying to improve van's...

-no it does not. i think i just worry too much sometimes. keep thingking of effeciency, i was planning to make something that will compensate for the rpm drop when in gear, somekind of added vsv in...

-thanks sir Tim for that urgent reply. you hit it sir, during heavy traffics here, definitely i'll be sitting long at idle, another scene is the very slow moving traffic where you would just crawling...

-ok sir Tim, it loses 200 rpm, if following the service manual, we should set it the idle at 750, right... shifting the gear, rpm goes down to 600-500 which i observed stresses the alternator because...

-i'm just wondering sir Tim, does your van with A/T lose rpm when shifted into gear?

-thank you sir Tim :)

-thank you for replying guys. actually i do agree with you both, but here's what made me decided to just remove all of the hoses, since i'm already a 3rd hand owner of the van, the previous owner...

-thanks sir Tim. but, can i also remove the hose of death? can i just plug that small tube and remove the hoses from the throtle body?

-i live in a very tropical country, vehicles here doesn't come with heater. i own a 88 A/T van and the hoses that goes to the heater cores are starting to leak. is it safe to just remove all of the...

-thank you very much eddieleephd for the reply. setting the rpm in 1000 makes the shiftshock a bit harsh, thats why i just set it around 800, i'm planning to make something that will compensate for...

does your van when shifted into gear lose RPM?, cause mine when shifted into gear engine rpm drops to from 750 to 600-500...

-can anyone help me out here?.... thanks

-does the ISCV compensates the RPM lose when shifting the van in gear?... guys can i hear your experiences about this ISCV?... thank you :)

-is the fuse layout in the 86 owner's manual the same with the 88 model?

-thank you very much sir, now i know, i'll try to restore that switch back...thanks again... :)

-mine is just a hole but with no solder to bridge, the passenger side power window still works... what could it be?

-is it originally like that sir? RPM drops when shifting gear?

-on the driver's side (door armrest), we have the master switch for the power windows and the power locks, mine has a missing button, between the power lock switch and power window switch, what is it...

-ok sir Tim thanks for your thoughts. You have an A/T van right?, do yours drops rpm when the gear selector is shifted to drive or reverse?

:LOL2: well i found this in the internet... http://www.autoshop101.com/forms/h26.pdf . based from what i read there, what i like to know is that do our ECU turns this ISC on when we shift the...

-hi sir freewheeling, mine is a 88 2WD A/T, i had this problem also before, and the problem was lose wiring connections in the terminals. check all wirings of the OD system, i believe that in 2WD A/T...

-thanks sir Tim, my ISCV was already missing, i want to restore it back, when do the ECU turns this ISC valve on?, in what situations do this ISC turn on?

-our van's engine has an ISC valve, when does this operate or turn on?

-our van's engine has an ISC valve, when does this operate or turn on?

-thanks sir Tim for the picture, i checked my PS pump, there's no hole for the air control valve, i think it was replaced already... thanks again sir... :)

let me share some modifications i did with the my cornering lights, i changed the bulb into a dual filament type, 21/5W, so that when you turn on the park lights, it turns on by 5W, and then when you...

sir Tim, do you have any picture of that air valve in the PS pump?.... thanks

now i know, thank you very much sir Tim for that... :)

the problem was there was a broken wire from the terminal in the steering column the one that is from the relay going through the switch, its makes me wonder the wires were quite small in size, its...

thank you so much sir Tim, i restored it, its working now, thanks to your diagram i was able to track the wires properly... i post another thread sir, can you help me with that sir?... thank you so...

- i stand for correction sir Tim, i think you're right, i checked the van again and i saw terminal wires for the fog lamps... whats missing is the fog lamp switch, i think they've removed it. i can...

i think you might be right at some point, but there is no wire for the fog lamps behind, but the cornering lights wire is still there but they didn't connect the corner lights to that wire, instead...

i saw this pic and tried to compare it from my van, and i think some parts of my van is missing, can someone tell me where do the these (orange arrows) tubes go?... and what is this (red arrow)...

thanks burntboot for the info regarding with the cornering light relay circuit. thats why i'm wondering, why would there be a fog lamp relay when i don't have fog lamps....

-thats why i'm restoring the cornering lights because i saw the wires behind the cornering light lens... can you give me sir the wiring diagram for the part of the cornering lights only?... as for...

how does the cornering light realy work? when does it turn on? i don't have a fog lights but refering to your pics, there's a for light light relay, if i don't have a fog lights, then what does the...

-thank you very much sir Tim for the great help. a bit of story from my van, i'm a 3rd hand owner of the van, when i bought it from the previous owner it runs well, i loved the van, when problems...