New 87 NA hesitation problems
07-15-07, 03:31 PM
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New 87 NA hesitation problems
Completey stock 87 NA. Car runs great until 4000rpms NO power at full throttle after 4 unless i give it half gas?
07-15-07, 05:52 PM
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This is a common problem on stock 86-87 cars. BUT you need to explain the no power after 4000 rpm better. IF you keep your foot on the pedal, will the engine finally keep on reving to six grand or better? Or are you saying is just sort of stops reving no matter how long you leave the pedal to the floor.\
If it is just a HESITATION at approx 4000 rpm and the engine will keep reving, then I'd suggest you go to your ECU and pull the small and middle plugs off. Find pins 3A and 3G in the small plug and pin 2R in the middle plug. Add an additonal wire to each pin/socket mentioned above and then terminate the other end of those three wires in a lug or if you willl a Ring terminal. Bolt the ring termimal to the bracket the ECU mounts to under one of the 10mm nuts.
There should NEVER be ANY HESITATION when the secondarys come on at apporx 3700 rpm. NONE. It should be a seamless transiton when the secondarys come on and the primarys drop to half what their duty cycle was prior to 3700 rpm. If you feel ANY hesitation...............do what I just mentioed to 3A, 3G and 2R. The key word is SEAMLESS. As in not noticeable at all.
I wrote a few words about this on the RTEK forum on this site yesterday and added a jpg that might makes sense to some. Depends on skill level ...humor.
Just ask Mr NZCONVERTIBLE if this is or is not an effective remedy for HESITATION. He used the method of adding a gnd not at the ECU pins but about a foot after the plugs up the harness where there is a mechanical splice where these wires come together. Either method should work, but I've decided the extra wire at the 3A, 3G, 2R is my preference.
Like I said, it depends a bit on what YOU mean by hesitation. Need a little more clarification.
Like if it's a non turbo, did you accidently knock the secondary injector plugs off?????????? Possible if you've been messing around on a NON TURBO car.
If it is just a HESITATION at approx 4000 rpm and the engine will keep reving, then I'd suggest you go to your ECU and pull the small and middle plugs off. Find pins 3A and 3G in the small plug and pin 2R in the middle plug. Add an additonal wire to each pin/socket mentioned above and then terminate the other end of those three wires in a lug or if you willl a Ring terminal. Bolt the ring termimal to the bracket the ECU mounts to under one of the 10mm nuts.
There should NEVER be ANY HESITATION when the secondarys come on at apporx 3700 rpm. NONE. It should be a seamless transiton when the secondarys come on and the primarys drop to half what their duty cycle was prior to 3700 rpm. If you feel ANY hesitation...............do what I just mentioed to 3A, 3G and 2R. The key word is SEAMLESS. As in not noticeable at all.
I wrote a few words about this on the RTEK forum on this site yesterday and added a jpg that might makes sense to some. Depends on skill level ...humor.
Just ask Mr NZCONVERTIBLE if this is or is not an effective remedy for HESITATION. He used the method of adding a gnd not at the ECU pins but about a foot after the plugs up the harness where there is a mechanical splice where these wires come together. Either method should work, but I've decided the extra wire at the 3A, 3G, 2R is my preference.
Like I said, it depends a bit on what YOU mean by hesitation. Need a little more clarification.
Like if it's a non turbo, did you accidently knock the secondary injector plugs off?????????? Possible if you've been messing around on a NON TURBO car.
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