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: engine idle "surging " and no heat cliffhanger4 04-21-2006, 09:23 AM Time to start fixing up my 87 n/a. I just replaced the engine with a JDM motor and the problem followed to new engine . The engine when warm will cycle up and down between 600 and 800 rpm checked all the hoses they seem ok. replaced all the plugs. Cleaned out the throttle body. Any Ideas???? Any Thoughs would be great supramacist 04-21-2006, 05:10 PM DO you mean that it idles between 6/1000??? honest question. because that is cool if you did. Because everything is alright. Or it's not steady, but jumpy? Is it just like run'n 6 and then lunges to 1000 and goes back to 6 for a bit???? I presonally need more details. supramacist 04-23-2006, 11:30 AM I take it you got it squared away??? cliffhanger4 04-23-2006, 04:57 PM Sorry I was away for the weekend. No haven't solved it yet. It will go up and down between 600 and 1000 at idle. one sec it will be 1000 then drop to 800 then 1000 then 600. You never no. It's not steady but jumpy. supramacist 04-23-2006, 08:39 PM I think you need a new set of plug wires. That's going to be the least expensive place to start. supramacist 04-23-2006, 08:43 PM Maybe....., if you have been working with the distributor cap and those plug wires you may have the wrong firing order. If not...., new plug wires. cliffhanger4 04-25-2006, 07:16 AM I will get new wires cap and rotor tonight and give that a try. Thanks Paul supramacist 04-25-2006, 07:47 PM Paul, If that does the trick you may as well do plugs as well. I would probably go ngk platinums or iridiums. Suprafast0422 11-14-2006, 08:21 AM Denso's are one of the best out there now, imo. Def recomend them, though they are a little pricey. dizahl 11-15-2006, 03:27 AM have you tried adjusting your idle? check your plugs and coil make sure you r getting enough juice, and check your injectors and fuel system. dizahl 11-15-2006, 03:28 AM densos and ngks cliffhanger4 11-15-2006, 06:54 AM I have replaced the plugs, fixed the trouble's coming up on the check engine light. The injectors are different one's that came with the new engine. I swapped out the ecu. I had replaced the wires before the engine swap (last year) didn't fix the idle. So the problem followed the car not the engine, I haven't replaced the fuel filter I thought about that the other day. I have noticed or can feel that the engine at higher speeds 1500 to 2000 rpm a miss or something??? dizahl 11-16-2006, 04:22 AM fuel filter or pump could cause that the fuel filter is kind of a bitch to replace it's above you differetial but i would try that, | ||