93 N* rough idle, no codes, loss power

pimpjuice01 · #1 (**permalink**) 01-05-07, 04:23 AM

Out of the blue my car started to idle rough and takeoff really bad, with loss of power. On top of that I noticed a bad smell, like something was burning. A week or two later, I changed the plugs because they were well overdue but not the wires. The car ran fine for a while, but now I'm noticing the same problems again. You can notice the engine vibrating, and you can see it in the rear view mirror because it shakes a bit.

Could it be from old plug wires?

I will change them soon, but I'm wondering if there is anything else that could be causing the issues.

THANKS

**Ranger** · #2 (**permalink**) 01-05-07, 11:44 AM

Could well be the wires. How about the EGR valve and "mouse holes" in the manifold? Have you cleaned those?

pimpjuice01 · #3 (**permalink**) 01-05-07, 07:42 PM

I'm not too sure about these mouse holes, but I bought that intake manifold cleaner. Ran the engine and sprayed some in while given it gas, also I cleaned my air filter too since I took it off. It seems to idle nice in park, but now in drive you can see it rough. The power loss is intermitten, I can be driving then feel a boosts of power then it'll disappear.

Also I gave it full throttle the other day, then I got this really odd smell after that. Like burning rubber or something? ODD

**Ranger** · #4 (**permalink**) 01-05-07, 08:01 PM

Sparying manifold cleaner through the Tb while running will not clean the TB. With the engine off, hold the throttle plate wide open and you'll see the carbon build up on the TB walls and the backside & perimiter of the throttle plate. You need to scrub that off with a toothbrush & rag til clean. The mouse holes are under the intake manifold cover on a '93. Rod them out with a coat hanger or such if they are caked with carbon.

pimpjuice01 · #5 (**permalink**) 01-05-07, 08:40 PM

I did open the throttle plate and sprayed a bunch of intake cleaner, there was not much dirt but it sure got rid of it.... I'll have to look for these mouse holes, I'm not very mechanically inclined but I was able to do the spark plugs on my own. Are they really visible to see?
Would that cause the odd smell?

**Ranger** · #6 (**permalink**) 01-05-07, 08:51 PM

Not sure about the smell. When you take the intake cover off, the "mouse holes" should be pretty evident. DO NOT over torque the manifold when reinstalling. Follow the FSM torque specs. If you do not have a FSM, someone else will have to provide the specs.

pimpjuice01 · #7 (**permalink**) 01-14-07, 08:12 PM

ok wellll.
I changed plugs/wires and sprayed the intake cleaner also opened up the throttle plate while cleaning. When you describe taking the intake cover off, how exactly do you get at that?

Do you get at these mouse holes by taking the engine cover off?
I bet I have about hundred people laughing at me right how hahaa

pimpjuice01 · #8 (**permalink**) 01-14-07, 08:16 PM

Another note that might help is.. I'll be crusing at a steady speed then the car will just start making a low vibration, very noticable and sounds pretty bad. I have to let go of the gas to get rid of the problem
*still no engine codes*
Rough idle intermittent
On takeoff sometimes you can feel the power come and go

**Ranger** · #9 (**permalink**) 01-14-07, 10:28 PM

Don't just spray the TB & throttle plate, scrub it til all the carbon is off.

Yeah, just remove the intake cover. 4 bolts if I remember correctly. The EGR passages (mouse holes) are inside. DO NOT attempt to start the engine with that cover off.

pimpjuice01 · #10 (**permalink**) 01-18-07, 09:45 PM

I checked my codes and I'm getting PO99 and PO70
P099 (E099) ................ Cruise Control Servo Applied, Not in Cruise
P070 (E070) ................................................ Intermittent TPS Signal

They are codes that are not on, but saved.

Could any of those cause the rough idle/takeoff this is now constant, with the same odd scent. Running rich maybe, because I"m getting half my mileage