7mgte, replaced head gasket, turbo, not cranking

87hilux7mge · 04-29-2011, 08:56 AM

yet another example of failure to "tag and bag". any time your doing major part replacement and you need to unhook several wires, label them with masking tape, and write what they are/where they came from, or # them on the sensor and wire 1, 2, 3 etc. etc.

this saves you the trouble of chasing down wires you may have missed. good luck with it tho..

87supra7mgte · 05-02-2011, 04:03 AM

yes, its a very good example of that 87hilux, i definately learned the importance of that on this build, but thank you very much to conga!!!! i did timed the CPS and it fired right up! idk if something got messed up a little tho, will not rev above 2000 RPM and heats up very very fast, i do have a few vacuum leaks tho that im still figuring out, but am getting the part to fix the vacuum leaks ASAP. any ideas of why it won't rev above 2000? also when i put in gear and let off clutch it has almost no power, wont climb rpm's at all, does some kind of backfire??? thinking maybe timing is too far advanced or something??? haven't had a chance to put a light on it yet, will do tomorrow. but she purrs like a kitten when idling, lol.

87hilux7mge · 05-02-2011, 06:14 AM

sounds like its advanced a decent amount. same thing happened on my pickup before swapping motors. idled awesome, but had no power and didnt want to rev at all. figured out my chain was 2 teeth off, so i had to mod the dizzy to get enough adjustment, but after that it worked great.

so yea, timing id say!

interested! · 05-02-2011, 07:27 PM

Hi!
Had the very same problem after overhauling my cylinder head!-would not rev beyond 2000 rpm !-- I overcame it by marking the direction of rotation ( DOR) of the rotor arm on the rocker cover and moving the distributer ( advance-earlier spark -- AGAINST the DOR )and RETARD-- later spark -WITH the DOR ) and move the distributer until the revs peaked and then locked it --it may be too far retarded and quickly overheats. I then checked the timing marks and nothing seems to line up BUT the car revs nicely,and takes a long time to open the thermostat now -- how weird is that?.

interested! · 05-02-2011, 08:04 PM

Hi!
Had the very same problem after overhauling my cylinder head!-would not rev beyond 2000 rpm !-- I overcame it by marking the direction of rotation ( DOR) of the rotor arm on the rocker cover and moving the distributer ( advance-earlier spark -- AGAINST the DOR )and RETARD-- later spark -WITH the DOR ) and move the distributer until the revs peaked and then locked it --it may be too far retarded and quickly overheats. I then checked the timing marks and nothing seems to line up BUT the car revs nicely,and takes a long time to open the thermostat now -- how weird is that?.

interested! · 05-02-2011, 08:58 PM

Hi!
Your ( 3 ) coil pack 1&6 2&5 3&4 -this is correct! You have 6 cylinders , 1&6 move up together to TDC (TOP DEAD CENTRE ) ,then 120 degrees later 2&5 reach TDC and 120 degrees later 3&4 reach TDC , this means the coils should double spark --one on firing stroke on No 1 and one on No 6 exhaust stroke,etc,, if :firing order 1-5-3-6-2-4, then :each coil sparks at : .1&6, 5&2 , 3&4,/ 6&1 , 2&5 , 4&3./ 1&6 -etc - hope this helps.

87supra7mgte · 05-03-2011, 03:08 AM

ok, its alive and well now...for the most part. it idles amazing!!! purrs like a kitten, but refuses to rev above 3000 rpm, it kicks itself down to about 2700 when it hits it, like the rev limiter is hitting. i read about this happening to another guy but there was no answer, any ideas? possbily dirty MAF sensor?? i hope its not in the ECU, i really can't afford to plug a computer into that thing

87hilux7mge · 05-03-2011, 05:14 AM

still sounds advanced too much.

04-29-2011, 08:56 AM	#1
87hilux7mge walbro fp Join Date: Dec 2010 Location: spokane Posts: 479	yet another example of failure to "tag and bag". any time your doing major part replacement and you need to unhook several wires, label them with masking tape, and write what they are/where they came from, or # them on the sensor and wire 1, 2, 3 etc. etc. this saves you the trouble of chasing down wires you may have missed. good luck with it tho.. __________________ 87 toyota 4x4 single cab short box pickup, 7MGZE.

05-02-2011, 04:03 AM	#2
87supra7mgte 3" Exhaust Join Date: Apr 2011 Location: Tacoma, WA Posts: 63	its alive!!!!!! yes, its a very good example of that 87hilux, i definately learned the importance of that on this build, but thank you very much to conga!!!! i did timed the CPS and it fired right up! idk if something got messed up a little tho, will not rev above 2000 RPM and heats up very very fast, i do have a few vacuum leaks tho that im still figuring out, but am getting the part to fix the vacuum leaks ASAP. any ideas of why it won't rev above 2000? also when i put in gear and let off clutch it has almost no power, wont climb rpm's at all, does some kind of backfire??? thinking maybe timing is too far advanced or something??? haven't had a chance to put a light on it yet, will do tomorrow. but she purrs like a kitten when idling, lol. __________________ 87 supra, 7MGTE, head gasket and turbo replaced, runs and boosts! fixing wiring odds and ends, then storage for a year basically...then comes big money cash in er, lookin for 500+ to the ground and a very sleek, sexy mkiii

05-02-2011, 06:14 AM	#3
87hilux7mge walbro fp Join Date: Dec 2010 Location: spokane Posts: 479	sounds like its advanced a decent amount. same thing happened on my pickup before swapping motors. idled awesome, but had no power and didnt want to rev at all. figured out my chain was 2 teeth off, so i had to mod the dizzy to get enough adjustment, but after that it worked great. so yea, timing id say! __________________ 87 toyota 4x4 single cab short box pickup, 7MGZE.

05-02-2011, 07:27 PM	#4
interested! 3" Exhaust Join Date: Apr 2011 Location: redhill surrey uk Posts: 142	car won't start Hi! Had the very same problem after overhauling my cylinder head!-would not rev beyond 2000 rpm !-- I overcame it by marking the direction of rotation ( DOR) of the rotor arm on the rocker cover and moving the distributer ( advance-earlier spark -- AGAINST the DOR )and RETARD-- later spark -WITH the DOR ) and move the distributer until the revs peaked and then locked it --it may be too far retarded and quickly overheats. I then checked the timing marks and nothing seems to line up BUT the car revs nicely,and takes a long time to open the thermostat now -- how weird is that?.

05-02-2011, 08:04 PM	#5
interested! 3" Exhaust Join Date: Apr 2011 Location: redhill surrey uk Posts: 142	car won't start Hi! Had the very same problem after overhauling my cylinder head!-would not rev beyond 2000 rpm !-- I overcame it by marking the direction of rotation ( DOR) of the rotor arm on the rocker cover and moving the distributer ( advance-earlier spark -- AGAINST the DOR )and RETARD-- later spark -WITH the DOR ) and move the distributer until the revs peaked and then locked it --it may be too far retarded and quickly overheats. I then checked the timing marks and nothing seems to line up BUT the car revs nicely,and takes a long time to open the thermostat now -- how weird is that?.

05-02-2011, 08:58 PM	#6
interested! 3" Exhaust Join Date: Apr 2011 Location: redhill surrey uk Posts: 142	car won't start Hi! Your ( 3 ) coil pack 1&6 2&5 3&4 -this is correct! You have 6 cylinders , 1&6 move up together to TDC (TOP DEAD CENTRE ) ,then 120 degrees later 2&5 reach TDC and 120 degrees later 3&4 reach TDC , this means the coils should double spark --one on firing stroke on No 1 and one on No 6 exhaust stroke,etc,, if :firing order 1-5-3-6-2-4, then :each coil sparks at : .1&6, 5&2 , 3&4,/ 6&1 , 2&5 , 4&3./ 1&6 -etc - hope this helps.

05-03-2011, 03:08 AM	#7
87supra7mgte 3" Exhaust Join Date: Apr 2011 Location: Tacoma, WA Posts: 63	its alive! ok, its alive and well now...for the most part. it idles amazing!!! purrs like a kitten, but refuses to rev above 3000 rpm, it kicks itself down to about 2700 when it hits it, like the rev limiter is hitting. i read about this happening to another guy but there was no answer, any ideas? possbily dirty MAF sensor?? i hope its not in the ECU, i really can't afford to plug a computer into that thing __________________ 87 supra, 7MGTE, head gasket and turbo replaced, runs and boosts! fixing wiring odds and ends, then storage for a year basically...then comes big money cash in er, lookin for 500+ to the ground and a very sleek, sexy mkiii Last edited by 87supra7mgte; 05-03-2011 at 03:10 AM.

05-03-2011, 05:14 AM	#8
87hilux7mge walbro fp Join Date: Dec 2010 Location: spokane Posts: 479	still sounds advanced too much. __________________ 87 toyota 4x4 single cab short box pickup, 7MGZE.

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