87 7mgte wont start when is hot

[mk3junkie]

i have a fully build 7m i do not have any emission on it the egr valve vsv is gone.can this be my problem with the not starting problems.

 

[hvyman]

no. egr does not have anything to do with starting.

does it crank?
do you have any codes?
do you have fuel?
do you have spark?

 

[Hmong_1G]

Nope. Emission won't effect a car from starting. I would check timing, compression, leak down test... then go from there. I would expect the coolant temp sensor to the ecu or main rely. Usually these are the symptoms. anyone else please fill in.

 

[mk3junkie]

crank yes
codes 24,51,52
fuel afpr shows 43psi
spark yes

 

[mk3junkie]

the car starts when it is cold every time.but when it is running temp it wont start. but i push startet and it runs great. im pushing about 20 psi and no problems until i shut it off

 

[jdub]

Hate to tell you this, but with those codes it can't possibly "run great".

What else have you removed from the engine besides the EGR?

 

[mk3junkie]

it dose man like i sad it starts when is cold and runs gret.i clerd the codes.the only time the codes come back is when the car dos not wont to start it crenks but it wont start.

 

[mk3junkie]

coge 24 is intake air temp sensot i dont think i have one
code 51 is ac i dont have one
code 52 is knock sensor signal

 

[Angry7M]

coge 24 is intake air temp sensot i dont think i have one
code 51 is ac i dont have one
code 52 is knock sensor signal

Code 24....I think you do have one. Its integrated with you Air Flow Meter, so youll have to replace the AFM, unless you have some wirirng issues.

Code 52.... It will bog down your car.

So there is room for improvement, and it can run greater. :nono:

 

[mk3junkie]

ok i see what u meen with code 24
http://www.cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?Section=FI&P=94

 

[jdub]

Ummm...code 51 is the TPS. No IDL signal to the ECU.

Code 52 is the knock senors or the circuit. With it present the ECU pulls a significant amount of timing. This alone will cause the car to run like crap.

Code 24 will cause the ECU to substitute a standard 20 deg C in the injector volume calculations.

 

[mk3junkie]

i put a new tps lasst week and the reeding to the ecu is good so ithink is the a/c. and ill see tomorow the afm and go from ther,but how come that it starts when is coold and no engine light but when it worms up and i shut it off it wont start.

 

[jdub]

If you installed a TPS and getting a code 51, you didn't adjust the TPS correctly. the only time the AC will cause a code 51 is when the AC button is depressed (and you don't have to have the AC installed).
I'm betting you didn't adjust the TPS right

Check your CPS wiring, especially at the connector...it's common to have frayed wires or a bad connector that will cause a no start.

 

[mk3junkie]

CPS wiring is ok i stardet the car it wormmed up i shut it off and it dos not wont to start.
whay dos it start when is coold but not when it worms up?

 

[mk3junkie]

i ceckt the knock sensor and it looks like i put them to close to ich other cud this be my problem

 

[mk3junkie]

i fixt the afm code 24 and the knock sensor code52 but i still have code 51 and the car dos not want to start now at all. now im lost it cranks fine but it dose not fire cekt spark and it is there any ideas

 

[Steven Dionne]

When it's hot just try to knock your cam sensor.
(it happen to me)

Steven

 

[IwantMKIII]

Sounds like a case of vapor lock.

Fix your other codes.

If i'm not mistaken, one of the VSV's on the intake side acts as a relief valve for vapors in your fuel rail. The vapors build up when the engine gets hot normally on a warm day. W/o or with it not working properly, it may cause initial starting problems.

 

[mk3junkie]

i think it cud be my timing i replaced the timing belt and folow the instruction and set the crenk shaft puly to O. playd with the cps and the mark on crank shaft pully is now at mark 2 when i line it up. and it wont start now at oll.

 

[IwantMKIII]

^a timing light may be useful.