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Nissan Frontier Maintenance and Repair

60 messages,  Last post on Aug 01, 2009 at 8:05 AM

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#11 of 60 Re: check engine light after installing k&n cai and throttle body spacer [badfireguy] by asa Nov 14, 2007 (3:23 pm)
Replying to: badfireguy (Sep 04, 2007 11:52 pm) The computer must be throwing a code that can be read for a diagnosis. AutoZone and other auto parts stores will often read codes for free. Replies to this message: badfireguy (Nov 14, 2007 5:31 pm) asa (Nov 15, 2007 3:28 pm) badfireguy (Nov 16, 2007 6:44 pm) and 1 more...
#12 of 60 Re: check engine light after installing k&n cai and throttle body spacer [asa] by badfireguy Nov 14, 2007 (5:31 pm)
Replying to: asa (Nov 14, 2007 3:23 pm) been there, done that. I bought a code reader myself. I really think the code (p505) is related to the engine idle speed, being either too high or too low. I have ordered a much more expensive diagnostic reader. In the manual for the truck it points to the idle adjustment screw on the drivers side of the engine below the egr valve. There is a black plastic screw next to another cavity that is covered with melted plastic covering on it. On my previous frontier (4 cyl) the adjustment screw was under the plastic covering. Could I be looking at the wrong screw? Replies to this message: asa (Nov 15, 2007 3:28 pm) badfireguy (Nov 16, 2007 6:44 pm) asa (Nov 17, 2007 6:03 am)
#13 of 60 Re: check engine light after installing k&n cai and throttle body spacer [badfireguy] by asa Nov 15, 2007 (3:28 pm)
Replying to: badfireguy (Nov 14, 2007 5:31 pm) I wish I could help, but I don't know anything about the location of the idle speed set screw. I'n my '92 Mitsu, it's on the throttle body and is covered by a rubber stopper.   Aside from the set screw, idle speed is adjusted automatically on many vehicles by an _ Idle Speed Controller (ISC) when headlights or the A/C is turned on and engine load changes. ISCs often get dirtied up over the years and they fail to perform causing erratic idle. In the case of my Mitsu, it throws an ISC code. Not wanting to pay near $300 for a new one (when cleaning it failed), I just unplugged it when the idle speed was stable and I've been fine. Perhaps you could try the same and at least isolate the problem? Replies to this message: badfireguy (Nov 16, 2007 6:44 pm) asa (Nov 17, 2007 6:03 am)
#14 of 60 Re: check engine light after installing k&n cai and throttle body spacer [asa] by badfireguy Nov 16, 2007 (6:44 pm)
Replying to: asa (Nov 15, 2007 3:28 pm) Well, I am now a genius. I went back to my old hot rodding days and stumbled on the cure. If this happens to anyone else, take a vacum guage and install it in-line with your emissions system. Remove the two connectors at the throttle position sensor. With the vehicle in neutral, all accessories off, adjust the idle screw until maximum vacum pressure is reached. Turn off the engine, reconnect the terminals to the tps, clear the check engine light with a code reader, drive the vehicle for a day, and there you go. Light has not come back on 500 miles later. It passed texas emissions testing today with no problem. I really think this is only a problem when you combine a cold air intake with a throttle body spacer. They say it can't be done, but let me tell you, My truck runs MUCH FASTER and gets the same or better gas mileage. The only problem is that you cannot keep your foot out of it. I have twice the acceleration with half the pedal now. The performance from 50 to 85 mph is stronger than a v-8 chevy pickup. (there have been several victims) So when k&n tells you that their intake will not work with a throttle body spacer, don't believe it! With the combination, you will be shocked. Plus the whistle from the intake makes people think it has a turbo charger under the hood. Replies to this message: asa (Nov 17, 2007 6:03 am)
#15 of 60 Re: check engine light after installing k&n cai and throttle body spacer [badfireguy] by asa Nov 17, 2007 (6:03 am)
Replying to: badfireguy (Nov 16, 2007 6:44 pm) Great fix badfireguy! Very clever and successful as far as performance too. Happy Motoring!
#16 of 60 Frontier Frontend troubles.. by ryan82 Nov 23, 2007 (4:07 pm)
I currently own a 1999 nissan frontier.. There barely any travel in the front suspension with out it bottoming out.. The rear of the truck sits much higher than the front.. 61/2 in from top of the wheel to the bottom of the wheel well.. compared to the 21/2 in in the front.. how is this fixed? Any suggestions would be helpful..   Thanks  Ryan82 Replies to this message: badfireguy (Nov 23, 2007 11:19 pm) asa (Nov 25, 2007 6:39 am) asa (Nov 26, 2007 12:10 pm)
#17 of 60 Re: Frontier Frontend troubles.. [ryan82] by badfireguy Nov 23, 2007 (11:19 pm)
Replying to: ryan82 (Nov 23, 2007 4:07 pm) The first thing I would do is change the front shocks. My favorite is the Monroe Reflex. an excellent shock that sells for about $45.00 each. It should raise the front end and will last forever. I'm guessing that you do not carry any weight in the bed, because the frontier does not have much spring in the rear. Adding a little weight to the rear will not only lower the level more than you would think, but will actually make the truck handle a little better and give you much more traction.   Good Luck! Replies to this message: asa (Nov 25, 2007 6:39 am)
#18 of 60 Re: Frontier Frontend troubles.. [badfireguy] by asa Nov 25, 2007 (6:39 am)
Replying to: badfireguy (Nov 23, 2007 11:19 pm) My favorite is the Monroe Reflex.   I second that. I put Monroe struts on my '92 Mitsu six months ago and the improvement in handling is phenominal. It's not a bad d-i-y job and I'm nothing more than an amateur weekend wrench. I "rented" spring compressors (for free) at Advance Auto. I also have the factory service manual and it was a help.   I'm assuming that the springs are up to specification? They might be weak. I recall seeing an entire assembled strut/spring package ready for installation, perhaps made by Monroe. This'd make the job VERY easy and would give you new springs too.
#19 of 60 Re: Frontier Frontend troubles.. [ryan82] by asa Nov 26, 2007 (12:10 pm)
Replying to: ryan82 (Nov 23, 2007 4:07 pm) If you have a 4x4, I should have suggested too that you check your torsion bars. If they're tired, your front will sag. These can also be cranked to elevate the front and /or change the spring rate. I've never had a 4x4 so can't give you more guidance on this.
#20 of 60 What model frontier is it? by badfireguy Nov 26, 2007 (5:34 pm)
Good point! It sounds like a 4cyl. 2wd truck. My last frontier (99 model) needed helwig springs and Rancho RS9000 shocks to fix the problem. So, Ryan what kind of truck to you have?

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