I'm having poor idle (not horrible, but definitely not as smooth as it should be) on my 89 LeSabre with 60k on the motor (3800 Series 1), 150k on the transmission (automatic 440-T4).
I have the following setup:
-Delco Type 2 coils (from a junkyard, but tested goo)
-Duralast 8mm plug wires from Autozone with about 15k miles on them
-NGK Iridium plugs with less than 10k on them, gapped to .060 as per factory for the 3800
-Flowmaster single in, dual out muffler
-High flow cat converter
-K&N high flow cone air filter
-good fuel pressure
So I'm thinking that I either have a weak coil or my plug wires are just too dinky to take the load of the Type 2 ignition system.
So which should I check first? Which might I consider replacing first? I'd opt for either thicker plug wires or higher output coil packs.
Or is there something I should check?
Thanks for suggestions :)
2007-11-14 06:01:48 · 9 answers · asked by Anonymous in Cars & Transportation ➔ Maintenance & Repairs
If its the EGR, how would I go about testing it? I might have a spare laying around that I could throw on it if I need to...
2007-11-14 06:12:18 · update #1
"plug leads.rotor arm and distributor cap.also your capicitor/condensor."
Don't have any of those. This is fuel injected with a coil pack and ignition module.
2007-11-14 06:13:26 · update #2
Needles? Jets? Carbs? adjustable Idle?
This is FUEL INJECTED. I don't have any of that stuff. I have a throttle body, Idle air controller, air temperature sensor, coils, ignition module, etc.
2007-11-14 06:33:46 · update #3
I'd suspect the plug wires. I had those same wires on my '93 Buick Century, they were junk within a year. The heat between the engine and firewall destroyed them very quickly.
2007-11-14 06:08:44 · answer #1 · answered by Galaxie500XL 5 · 0⤊ 0⤋
If you are sure that your ignition setup is solid, then it probably is. There is probably another problem that is keeping your car from idling properly. Perform this test: when it is warmed up and at an idle, push down on the pedal. Push it about halfway down and listen to how the engine speeds up. Then listen to how it idles. If it sputters and stalls when it returns to idle, your idle speed may be set too low, go ahead and adjust it. Now push the accelerator to the floor as fast as you can. It should be an instantaneous response. If it is hesitant or stumbles upon acceleration, you probably have IMPROPER ENGINE TIMING. Either do it yourself or take it to a shop for a tune-up. If it is running poor and is not bad timing like above, keep constant check of the engine oil level and radiator fluid level. If it seems to be losing fluid and there is a slight hiss from the engine, it could be a leaky head gasket. If none of these is the problem, check your intake. Be sure that the automatic choke is working right and that your carbureutor is getting enough air. If you are sure the problem is in the ignition system, take out the coils and take them to the auto parts store. Have them test your coils and wires. Replace them if they are bad. Check your distributer as well, if the points or rotor are worn, replace them. If all of the above is perfect, then your car should be running (and idling) great!
2007-11-14 06:21:28 · answer #2 · answered by Anonymous · 0⤊ 0⤋
I'd change wires and plugs to start with...stick with AC Delco plugs...aftermarket ones like NGK or Splitfire are known to cause spark problems. Coils can be tricky to test as they can be ok when cold yet have a high internal resistance when warm or hot..same thing with modules....you have to test them when hot as well to be accurate. Poor or rough idle could be a number of other things as well with the FI system but if no codes are coming up and fuel pressure/injectors are OK, I'd say it's probably ignition related.
2007-11-14 07:14:27 · answer #3 · answered by paul h 7 · 1⤊ 0⤋
throw that piece of shite air filter away... itll run better without it than it ever did with it...
they are the wrong shape for smooth airflow and combustion, and they are crap, designed to look good... but they dont explain you cant just fit em... and certainly not without tweaking the main jets and needle...and on a injection engine its called a mass airflow meter, and it is adjustable
2007-11-14 06:26:17 · answer #4 · answered by Anonymous · 1⤊ 0⤋
i would check the wires duralast wires are junk ive had to replace them with only couple hundred miles. the boots get soft and spongy with head
2007-11-14 07:05:40 · answer #5 · answered by easytom92 2 · 1⤊ 0⤋
you need the best set of wires you can buy.. but are you even sure it is an ignition problem.. may be a leaking egr valve
2007-11-14 06:08:52 · answer #6 · answered by John St.Louis 5 · 0⤊ 0⤋
Chang your plug leads.rotor arm and distributor cap.also your capicitor/condensor.
2007-11-14 06:11:17 · answer #7 · answered by the rocket 4 · 0⤊ 0⤋
any check engine lights on? check fuel filter / pump? timing, distributor.
2016-05-23 03:50:36 · answer #8 · answered by georgina 3 · 0⤊ 0⤋
Please tell me how you tested coils????
2007-11-14 06:14:35 · answer #9 · answered by polkan47 4 · 0⤊ 0⤋