Poor performance (not spark related)
10-03-2005 | 02:59 AM
#1
Thread Starter
Member
Joined: Jul 2005
Posts: 41
Poor performance (not spark related)
Hi,
I have just recently replaced my plugs, leads, distributor cap and rotor head so my problem isn't there.
My car performs quite poorly and uses much more fuel than my friend's similar VG30E maxima. I have a 470KOhm resistor in the knock sensor connector from the ECU and no matter how far I turn the distributor clockwise, the engine will NOT knock/ping. This leads me to believe that it is on the 'safe' ignition timing mode for when the knock sensor is faulty even though I have a 470KOhm resistor in the connector. Is 470K the right one to have in there?. Is there any way to find out if this is happening?
Could my poor performance be due to bad injectors? how can i test for that? I recently had them cleaned so they're not blocked.
Any help would be greatly appreciated.
I have just recently replaced my plugs, leads, distributor cap and rotor head so my problem isn't there.
My car performs quite poorly and uses much more fuel than my friend's similar VG30E maxima. I have a 470KOhm resistor in the knock sensor connector from the ECU and no matter how far I turn the distributor clockwise, the engine will NOT knock/ping. This leads me to believe that it is on the 'safe' ignition timing mode for when the knock sensor is faulty even though I have a 470KOhm resistor in the connector. Is 470K the right one to have in there?. Is there any way to find out if this is happening?
Could my poor performance be due to bad injectors? how can i test for that? I recently had them cleaned so they're not blocked.
Any help would be greatly appreciated.
10-03-2005 | 04:28 AM
#2
Senior Member
Joined: Dec 2004
Posts: 4,323
From: EU Scandinavia
Originally Posted by bradsm87
.... how can i test for that? I recently had them cleaned so they're not blocked.
Any help would be greatly appreciated.
Any help would be greatly appreciated.
- NGK?
- REAL wires?
- Smbdy here bough two bad new caps in row...
'Anythin' between 10k-0.5Mohm goes.
IACV: read the forum. My CD page has a writeup. Read THE Favorite links.
Btw. Machining useless msg's litter the forum; pls collect em' under one thread. (useless: this forum has thread after thread answers to these trivial q's)
10-03-2005 | 04:47 AM
#3
Thread Starter
Member
Joined: Jul 2005
Posts: 41
Do you think I should put another 470K Ohm resistor in just in case?
The Leads and the plugs are NGK and the cap and rotor head I got from Nissan Parts. I have abig stereo in my car at the moment and interference is allready a big problem. I trust my nice new NGK leads as they are.
I really think the problem is that the ignition timing is in 'safe' mode despite the fact that it has a 470K Ohm resistor in the knock sensor plug. I think the fact that I can turn the distributor as far clockwise as it will go and the engine still doesn't detonate! I'll clean the ECU plug tomorrow and apply conductive grease to all the contacts (if i can find somewhere that actually sell it because last time i couldn't find anywhere)
Just thought I'd say Wiking that you have been and still are SO HELPFUL in the VG30E Community! I dunno what I'd do without you!
The Leads and the plugs are NGK and the cap and rotor head I got from Nissan Parts. I have abig stereo in my car at the moment and interference is allready a big problem. I trust my nice new NGK leads as they are.
I really think the problem is that the ignition timing is in 'safe' mode despite the fact that it has a 470K Ohm resistor in the knock sensor plug. I think the fact that I can turn the distributor as far clockwise as it will go and the engine still doesn't detonate! I'll clean the ECU plug tomorrow and apply conductive grease to all the contacts (if i can find somewhere that actually sell it because last time i couldn't find anywhere)
Just thought I'd say Wiking that you have been and still are SO HELPFUL in the VG30E Community! I dunno what I'd do without you!
10-03-2005 | 04:58 AM
#4
Senior Member
Joined: Dec 2004
Posts: 4,323
From: EU Scandinavia
Originally Posted by bradsm87
Do you think I should put another 470K ...
One 470k is ok. ( I have two parallel 1MOhm which makes 0.5Mohms) Can u measure that resistance at ECU =harness ok?
I have found no writeup/explanation, but I think that as long as ECU input has any resistance, the logical state is defined as KS ok -signal.
Thanks for compliments. This forum has lots experienced ppl, I add to one niche corner...
Thread
Thread Starter
Forum
Replies
Last Post
Need help
5th Generation Maxima (2000-2003)
23
10-02-2015 09:56 AM