Defective or dirty injector

[creaker2]

I have a 1996 camry with 160,000 miles. The car started to run rough and then I got a "check engine" warning light. Code 301 indicates cylinder #1 is misfiring. I pulled the spark plug. It looked good but I replaced it anyway. Spark looks good. Just to be safe, I ran resistance checks on the spark plug wires and the coil. The resistance readings are within factory specs. I also connected a test light on the electrical connection to injector #1. I get a good signal from the ECM.

The problem appears to be the injector on cylinder #1 . The manual says resistance shoud be 13.8 ohms. I got 54 ohms on cylinder #1. The other injectors show about 14 ohms resistance.

I haven't tested fuel pressure since I don't have a pressure gauge. I'm assuming a fuel pressure problem would causes problems with multiple cylinders. Is this a correct assumption?

Replacing the injector on cylinder #1 is a real pain since it's buried under the air intake chamber plus I'm looking at about $250 for the injector and various o-rings and gaskets. Do I really need to change the injector? Does a high ohm reading mean the injector is electrically trashed or would a good cleaning fix the problem? Can I just add a can of Techron to the gas tank? I'm concerned that running the car for extended periods with one cylinder misfiring will damge the catalytic converter or something else. Is this true? Any other options or tricks I'm missing?

If the final answer is to replace the injector, do I need to remove the air intake chamber and throttle body as a single unit per the manual or can I disconnect between the two units? It appears to create a lot of extra work to remove the throttle body but maybe I'm mising something. Anyone successfully do this job without removing the throttle body?

I only plan to replace one injector due to the high price for a single injector ($150 on-line, $193 at the local dealer). Other posts suggest that injectors typically last well beyond 160,000 miles. Do you guys agree that injectors last much longer than 160,000 miles?

[96paseo]

With a reading that high, I would recommend replacing the injector. As far as prices go, look online for a re-manufactured set. There's a company in Nevada I ordered injectors from for my paseo. I got a set of four for under $200. I replaced my injectors for sake of maintenance at about 220,000 miles. I didn't have any problems at the time. Make sure to order a full set of seals from them as well. Here's a couple links. The first link is for the 2.2L The second is for the 6 cylinder. I'm not sure which engine you have.

http://www.fuelinjectorsoutlet.com/p...oducts_id=1084

http://www.fuelinjectorsoutlet.com/p...oducts_id=1096

[creaker2]

Originally Posted by 96paseo

With a reading that high, I would recommend replacing the injector. As far as prices go, look online for a re-manufactured set. There's a company in Nevada I ordered injectors from for my paseo. I got a set of four for under $200. I replaced my injectors for sake of maintenance at about 220,000 miles. I didn't have any problems at the time. Make sure to order a full set of seals from them as well. Here's a couple links. The first link is for the 2.2L The second is for the 6 cylinder. I'm not sure which engine you have.

http://www.fuelinjectorsoutlet.com/p...oducts_id=1084

http://www.fuelinjectorsoutlet.com/p...oducts_id=1096

Thanks for the low cost option. I'll give it some thought. I might be inclined to use rebuilts on the radiator side of the engine. Since it's so much work to access the 3 injectors under the air intake manifold, i might buy new a injector for this side of the engine. I have a V6. I rechecked the resistance on the bad injector after checking the calibration of my VOM. The correct reading is 8K ohms. Thanks