My 87 Na 5spd tends to bog down really bad anytime I go wide open throttle below like 5k rpm. It also seems to be worse when the car isn't fully warmed up. Does anyone know what could cause this? Cause it almost got me rear ended when I pulled out into traffic today.
Bogging at wide open Throttle
- Thread starter Zapp
- Start date
i have the same problem with my 88 n/a mostly when its raining out but it never last more then a minute.
Start small, run a ECU diagnosis, and see what the computer says. It might be an O2 sensor.
It could also be a clogged fuel filter, weak fuel pump or a bad FPR. I think you have a fuel issue like low pressure and its causing you to leaning out and bog when you floor it.
Also look at the plugs they will tell you how you engine is running.
It could also be a clogged fuel filter, weak fuel pump or a bad FPR. I think you have a fuel issue like low pressure and its causing you to leaning out and bog when you floor it.
Also look at the plugs they will tell you how you engine is running.
http://www.cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?S=FI&P=73
Check it both with and without the vacuum hose on. With hose off quickly snap the throttle wide open several times. If pressure doesn't drop more than 2 psi there's no restriction in the fuel supply. And the problem can't be related to the O2 sensor. Something tells me it's not boost related either
Check it both with and without the vacuum hose on. With hose off quickly snap the throttle wide open several times. If pressure doesn't drop more than 2 psi there's no restriction in the fuel supply. And the problem can't be related to the O2 sensor. Something tells me it's not boost related either
jetjock;1346513 said:http://www.cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?S=FI&P=73
Check it both with and without the vacuum hose on. With hose off quickly snap the throttle wide open several times. If pressure doesn't drop more than 2 psi there's no restriction in the fuel supply. And the problem can't be related to the O2 sensor. Something tells me it's not boost related either
Ok thanks. And the fact that its in the GE section shows its not boost related, haha
If pressure does drop it might also be an electrical problem. I've seen more than a few of these cars where the fuel pump speed relay goes bad. One quick way to test that is to jumper the pump on (B+ to FP) in the diagnostic block and drive the car. If the problem goes away suspect a bad pump relay...