Crush

I have had all of my injectors checked out and serviced and they are all good. I noticed that once my car hits 38oo rpms though that I lose all power. I have a ton of low end power and speed, but after 3800 it just drops off. I just installed a A/F guage and accelerating up to 3800 it shows almost perfect stoich a/f, but after 3800 the gauge goes all the way lean, so far that the gauge doesnt even read it. So, I am not getting fuel from the secondaries. What can I do to check it out? And what can I do to fix it.?

1987RX7guy

iTrader: (3)

Check your wiring man. Maybe the harness plugs are shorted out?

HanniganFC

I would say it is your solenoid resistor it is located under your airbox it controls your secondary injectors im 99% sure this is your problem

J-Rat

iTrader: (2)

My guess is, plugs are loose

Crush

I have checked the plugs with a voltmeter and they tested fine, also they are tight on the injectors. How can I check the solenoid resistor?

J-Rat

iTrader: (2)

If your resistor pack failed, you would probably lose all 4 of your injectors. I am going to look at the FSM, but its funny that your car ran fine BEFORE your injectors were removed and installed.

jkrueger

iTrader: (2)

Did you put the injector grommets back it. You could be lean from too much air if it is leaking in somewhere. I've seen that before.

J-Rat

iTrader: (2)

There is a whole troubleshooting section in the FSM.

But it does have you check the Resistor (why you guys insist on calling it a solenoid resistor, I have no idea).
It also has you checking the CAS.

I would pop off the connectors, and, using an ohmmeter check for an open.

Jarrett

Crush

OK, I will check everything this weekend. And yea, I checked and double-checked to make sure the grommets were in before putting everything all together.

HanniganFC

I have had this exact same problem, the resistor controls the secondary injectors if it is not working only the secondary injectors will not work. you can still drive the car you just cant floor it or it will bog and you will have let off the gas to keep moving.

Haynes manual calls it that

kiker14

iTrader: (1)

Hey guys, I had the same problem, I needed to get all new new injectors and now it works fine... don't know if that helps at all

J-Rat

iTrader: (2)

The ECU controls the secondary injectors, all the resistor does is impdence match the resistors to the ECU.

HanniganFC

Well i know for a fact that my secondary injectors were not working. once i replaced my resistor they worked fine.

J-Rat

iTrader: (2)

Oh, a bad resistor can cause your injectors not to work. The signal would never get there. But the resistor doesnt control the injector.

HanniganFC

ahhh thats what i ment . i guess i should have said that

DelSlow

iTrader: (2)

go get a Bosch Noid tester, they are like 5 bucks at autozone or someplace like that, then take off the injector harness plugs and plug the noid tester into one, have someone rev it up to a point when the secondaries should come online, if it lights up, then the injectors are shot, if it doesnt, you know the problem is is somewhere in the electrical system.

J-Rat

iTrader: (2)

Never heard of that...Good stuff! Is it expensive?

HanniganFC

Napa sells it for about 100.00