23 psi at 1500 rpm and about 10-15 in the 3000 range. Fuel pump voltage is 5.80 at idle and 11 with B+ and FP jumped. I Tapped into the fuel pump at the pressure sending unit in the trunk I'm going to check the voltage when revving it, just waiting for some help from a second person.
89 Supra rebuild help please won't rev past 3,000 Slow revs.
- Thread starter Raggan
- Start date
The voltage should be 9 at idle and switch to 12 in the 2000+rpm range iirc so yours is way low. You should test the relay operation and read out the fuel pump resistor on the passenger fender by doing this.
http://www.cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?S=FI&P=114
This probably won't prevent operation past 3000 but it sounds like there is more than one problem.
http://www.cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?S=FI&P=114
This probably won't prevent operation past 3000 but it sounds like there is more than one problem.
I have already tested the relay and resistor as well as tried 3 other ones, however the fuel resistor gets really hot like you can't touch it hot.
Are you using a Fluke or other digital multimeter or analog with adjustable 0? Reason I am asking is because the two voltages you mentioned are both low. What does the meter read when you test the battery for example both statically
and running?
The pump resistor has heat sinks so it does get hot. I bypassed mine when I was running a walbro to get rid of a lean spike when it switched from 9 to 12 volts.
and running?
The pump resistor has heat sinks so it does get hot. I bypassed mine when I was running a walbro to get rid of a lean spike when it switched from 9 to 12 volts.
Theres nothing wrong with the multi meter its used by a professional and its snap. If i wire my other car white its running directly to the pump, it gets 12.5 volts but no fuel pressure increase at allf00g00;2046952 said:
so aftet many painful fays and nights it is fixed. Turns out the fuel dampener was no good swaped a used one in and it revved right up.
Good to read but... How?
Are you sure it's not the Fuel Pressure Regulator instead?
Because until the Fuel damper is leaking or is plugged, I can't see how it could affect pressure.
Are you sure it's not the Fuel Pressure Regulator instead?
Because until the Fuel damper is leaking or is plugged, I can't see how it could affect pressure.
Yeah but im having a power steering issue now its ouking iut the reservoir. Spent a hour or so bleeding it
