90 240 what to do? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

TPnTX · 01-11-2002, 08:34 AM

Some problem solving needed. 90 240. I was sucking up the gas. I just bought so I thought I'd tune it up a bit. Plugs, plug wires, rotor, rotor cap, all filters, o2 sensor. That certainly didn't hurt things any but barely noticed MPG inprovement. Then.....

I notice the fuel injector elec. connectors where cracked.  At first I was going to just check them and maybe seal with silicon or something. I wiggle the #2 connector while the car was running and the motor started sputting and shaking. I wasn't able to get it to stop doing this so I popped the pin out and tool the connector off. I saw then how corroded it was both on the wire and the injector. So I cleaned it. Wire brush, file, elect spray. That didn't help. So I went and bought new connector harness from Nissan. They didn't sell one for the 240 but the 300zx would work IF you cut and spliced the wires which I did. I replaced all of them cleaning each pair of connectors on the injectors. It still ain't fixed.
It idles fine. It shackes and sputters on initial/slow acceleration.  If you get on it it runs smooth. Revs up real good too. Driving on the highway, if you accelerate , it runs great but when you settle at a speed and the r's are low it sputters some.

I don't know, it didn't do this before I started jacking with the connectors.

I was also suprised at how easy you can rotate the injector. You like clockwise and couter clockwise.

I'll continue to track this down and hopefully find a solution, but if anyone has seen this before I'd sure appreciate some pointers.
Right now because of the highway sputter I'm really using some gas. My 92 V6 Chevy pickup gets better MPG.

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01-11-2002, 08:34 AM	#1
TPnTX Join Date: Jan 2002 Posts: 41 Trader Rating: (0) Feedback Score: 0 reviews	Some problem solving needed. 90 240. I was sucking up the gas. I just bought so I thought I'd tune it up a bit. Plugs, plug wires, rotor, rotor cap, all filters, o2 sensor. That certainly didn't hurt things any but barely noticed MPG inprovement. Then..... I notice the fuel injector elec. connectors where cracked.  At first I was going to just check them and maybe seal with silicon or something. I wiggle the #2 connector while the car was running and the motor started sputting and shaking. I wasn't able to get it to stop doing this so I popped the pin out and tool the connector off. I saw then how corroded it was both on the wire and the injector. So I cleaned it. Wire brush, file, elect spray. That didn't help. So I went and bought new connector harness from Nissan. They didn't sell one for the 240 but the 300zx would work IF you cut and spliced the wires which I did. I replaced all of them cleaning each pair of connectors on the injectors. It still ain't fixed. It idles fine. It shackes and sputters on initial/slow acceleration.  If you get on it it runs smooth. Revs up real good too. Driving on the highway, if you accelerate , it runs great but when you settle at a speed and the r's are low it sputters some. I don't know, it didn't do this before I started jacking with the connectors. I was also suprised at how easy you can rotate the injector. You like clockwise and couter clockwise. I'll continue to track this down and hopefully find a solution, but if anyone has seen this before I'd sure appreciate some pointers. Right now because of the highway sputter I'm really using some gas. My 92 V6 Chevy pickup gets better MPG.