Weird problem, need help!!

[Jllahman]

So I just rebuilt my 7mgte and got it running good set the timing to factory settings, but when I drove it it would accelerate smooth to about 4000rpm then will hesitate and not accelerate much past that. I was thinking it was a boost leak but I checked all the connections and they seem good. Then I was thinking maybe a fuel pressure issue, I don't have a pressure gauge on it so I can't tell. Its the stock fuel pump and injectors with a new filter. Although I did take out the fuel inlet thing. Any idea's what it could be??

The only mods are a HKS 2.0mm MHG, upgraded front mount, 3in turbo back exhaust, Greddy bov (recirculated).

Any help would be greatly appreciated!

 

[89supracrazy]

Any codes?

 

[Jllahman]

Only code is code 11. Which is intermittent power failure to the ecu. When I got that I reground the ecu wires but its still coming up.

 

[sweaver]

Although I did take out the fuel inlet thing.

pulsation dampner? or fuel pressure regulator? both of which are on the fuel rail. fpr on the front of the rail and the pd is on the back of the fuel rail where the fuel comes from the pump/tank to the rail. also i dont see a code 11 http://www.cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?S=FI&P=26

 

[Jllahman]

Yeah I removed the pulsation dampner I just couldn't remember the name of it. And the code 11 isn't in the TSRM but its in the Haynes repair manuel.

 

[89supracrazy]

http://www.cygnusx1.net/Supra/TechTips/engine_error_codes.aspx


Check this out on the code 11. I would start with the main relay and check it. It is located under the hood in the fuse box.

 

[Jllahman]

Thanks for the help.

Does anyone have an idea on the other problem? Or could the ecu problem be causing that?

 

[sweaver]

Yeah I removed the pulsation dampner

did you replace this? is it leaking? lots of guys replace this when adding an adjustable fuel pressure regulator and larger fuel pump. this could cause fuel interuption to your injectors if the rest of your fuel system is stock.

I don't have a pressure gauge on it so I can't tell. Its the stock fuel pump and injectors

ok i just read your first post again.

 

[hvyman]

Removing it is not going to cause that.

You need to fix 11. It will cover up any other stored codes and needs to be fixed right away. Are the ground wires on the intake manifold clean and tight?

 

[bioskyline]

how are your battery connections?, mainly the smallish wire that runs to the underhood fuse panel. is the altanator working? and check the grounds on the intake aswell, aswell.

 

[hvyman]

11 is ecu. Not battery.

And NO your ecu is not at fault unless you crossed wires. 7m ecu's do not go bad.

 

[Jllahman]

did you replace this? is it leaking? lots of guys replace this when adding an adjustable fuel pressure regulator and larger fuel pump. this could cause fuel interuption to your injectors if the rest of your fuel system is stock.

I took out the pulsation dampner because it was spraying fuel everywhere when i started the car. I replaced it with a straight AN fuel line directly to the rail (see picture). The rest of the fuel system is stock, pump, fpr, injectors, management, etc.

how are your battery connections?, mainly the smallish wire that runs to the underhood fuse panel. is the altanator working? and check the grounds on the intake aswell, aswell.

The battery connections are all good. Although the alternator isn't the best... either that or the battery isn't holding charge very well. And for the grounds on the intake i moved them to the frame and there tight. I assumed moving them from the intake to the frame wouldn't hurt anything.

 

[IJ.]

Put them back on the Intake.....

 

[bioskyline]

put them back on the intake. toyota put them there for a reason.

 

[Jllahman]

I'll put them back on the intake. And I just checked the main relay and its good I just cleaned the connectors and put it back on. But while I was looking in the fuse box the alternator 100amp fuse is blown. So I'll replace that also and update you guys. Does anyone know how to remove the alternator fuse? I appreciate the help so far!

 

[bioskyline]

the alt fuse i think has a 8mm bolt on the side holding it in, ill double check on mine.

 

[Jllahman]

the alt fuse i think has a 8mm bolt on the side holding it in, ill double check on mine.

I got it. There were two bolts on the side

---------- Post added at 06:04 PM ---------- Previous post was at 06:03 PM ----------

Is the alternator fuse something I can only get from toyota?

 

[hvyman]

no. Just take the old one to a parts store.

 

[Jllahman]

Alright I replaced it and moved the grounds back but nothings changed..