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seeodywhy · 09-24-2009, 10:39 PM

I put a D15Z1 into my 91 HF last year. If I plug in the cigarette lighter or turn on the turn signal or something the idle will bog down. But if I turn on the headlamps It will bog for a second or two and then increase back up to normal. It's been like this for over a year now. I'm averaging high fifties on highway road trips but I generally get 35 to 40 all city. I'm sure it is related to this problem. Also when I accelerate the car feels as though it is the timing is retarding at regular intervals. Kinda like pulsating or something. It is not the O2 as I had the hesitation problem when I first did the swap and a new sensor fixed it. I have Gone through the trouble charts but if anything is out of spec according to the charts the check engine light would be on. In other words the manual assumes the light is on. Other than that you have to replace parts until you find the culprit. Does anybody know what this could be.

09-24-2009, 10:39 PM	#1 (permalink)
seeodywhy EcoModding Lurker Join Date: Jul 2009 Location: Baltimore, MD Posts: 38 Thanks: 0 Thanked 2 Times in 2 Posts	Idle bogs with elec. load HF to D15Z1 I put a D15Z1 into my 91 HF last year. If I plug in the cigarette lighter or turn on the turn signal or something the idle will bog down. But if I turn on the headlamps It will bog for a second or two and then increase back up to normal. It's been like this for over a year now. I'm averaging high fifties on highway road trips but I generally get 35 to 40 all city. I'm sure it is related to this problem. Also when I accelerate the car feels as though it is the timing is retarding at regular intervals. Kinda like pulsating or something. It is not the O2 as I had the hesitation problem when I first did the swap and a new sensor fixed it. I have Gone through the trouble charts but if anything is out of spec according to the charts the check engine light would be on. In other words the manual assumes the light is on. Other than that you have to replace parts until you find the culprit. Does anybody know what this could be.