Engine problem - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

AUtyger · 09-30-2001, 09:13 PM

My '91 240SX 5-speed suddenly began to miss fire and hesitate. After new cap, rotor, plugs, and wires, I found that #4 piston seemed to have no life. You could disconnect the wire or the injector, and notice no change in the extremely bad idle. I swapped the #4 injector with the #1 injector, and the problem now is on the #1 piston. So, I ordered a new injector, installed it, and still have a really bad idle. Must I remove the fuel rail, clean it out, and reinstall everything? Am I barking up the wrong tree? I bought the car, as a toy, a few months ago, and I am a Nissan newbie. Any help is greatly appreciated!

S13Grl · 10-01-2001, 08:02 AM

Yeah, I would suggest checking the fuel rail. P.S. Since, it's broken, upgrade it at the same time: Get a better fuel pump! <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt=':)'> Post back with results!

Irena

*drifterx* · 10-01-2001, 09:01 AM

did u order your injectors already?
i ahve some used ones....... i wanna sell them...... let me know....

HippoSleek · 10-01-2001, 09:46 AM

Okay, it sounds like you may have isolated the problem to the injector.  After you replaced it, did you notice any improvement?  What I am thinking is that the ECU might have learned to adjust for this and is continuing to do so.  IIRC, resetting the ECU is a PITA (involves disconnecting the battery for 2 days or something).  Anyone know more about this?  

*ca18guy* · 10-01-2001, 09:54 AM

to reset the ECU, disconnect the battery for 1/2 an hour.

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09-30-2001, 09:13 PM	#1
AUtyger Join Date: Sep 2001 Posts: 10 Trader Rating: (0) Feedback Score: 0 reviews	My '91 240SX 5-speed suddenly began to miss fire and hesitate. After new cap, rotor, plugs, and wires, I found that #4 piston seemed to have no life. You could disconnect the wire or the injector, and notice no change in the extremely bad idle. I swapped the #4 injector with the #1 injector, and the problem now is on the #1 piston. So, I ordered a new injector, installed it, and still have a really bad idle. Must I remove the fuel rail, clean it out, and reinstall everything? Am I barking up the wrong tree? I bought the car, as a toy, a few months ago, and I am a Nissan newbie. Any help is greatly appreciated! __________________ '91 240SX SE 5-speed[br]War #### Eagle!

10-01-2001, 08:02 AM	#2
S13Grl Married to the Mob Join Date: Dec 2000 Age: 40 Posts: 3,670 Trader Rating: (0) Feedback Score: 0 reviews	Yeah, I would suggest checking the fuel rail. P.S. Since, it's broken, upgrade it at the same time: Get a better fuel pump! <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt=':)'> Post back with results! Irena

10-01-2001, 09:01 AM	#3
drifterx Premium Member Join Date: May 2001 Location: boston, ma Age: 40 Posts: 1,533 Trader Rating: (0) Feedback Score: 0 reviews	did u order your injectors already? i ahve some used ones....... i wanna sell them...... let me know....

10-01-2001, 09:46 AM	#4
HippoSleek Nissanaholic! Join Date: Aug 2001 Location: elsewhere Posts: 2,081 Trader Rating: (0) Feedback Score: 0 reviews	Okay, it sounds like you may have isolated the problem to the injector.  After you replaced it, did you notice any improvement?  What I am thinking is that the ECU might have learned to adjust for this and is continuing to do so.  IIRC, resetting the ECU is a PITA (involves disconnecting the battery for 2 days or something).  Anyone know more about this?

10-01-2001, 09:54 AM	#5
ca18guy Premium Member Join Date: Jul 2001 Location: Clearwater FL Age: 39 Posts: 3,226 Trader Rating: (0) Rides Gallery: ca18guy Feedback Score: 0 reviews	to reset the ECU, disconnect the battery for 1/2 an hour.