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Thanks much Eric; I did notice that my post was much longer than most. I appreciate the freedom to keep going. I wouldn’t rule anything out as this point, but when I did the work back in January, I replaced the timing chain and sprockets. The new one had less slack than the old and lined up nicely. I’ll see what my mechanic friend finds out soon. I’ll be sure to post it. Also, I’ll pass along you suggestion here. The timing chain cover is unfortunately sealed as it does not utilize a distributor. Thanks for your interest. I have an Aunt who lives in Adams county Ohio, not far from you. She owns a huge farm…would love to come to the “meet up” in July sometime…
Hamby’s Auto, I quite literally laughed out loud at the 5 gallons of gas reference. As a former insurance adjuster, the stories I could tell…Once a fellow adjuster adjusted a claim on a burned out vehicle on the side of the road.A pretty young lady even cried at the scene on his shoulder. Later he discovered the car was missing the front axles and transmission…haha..I digress…
When I got the heads back from the machine shop, I did install new valve seals on my bench. The bottoms of the valves (combustion chamber side) looked very clean. There was, however, some carbon on the stems…not excessive. I will keep you all up to date. As long as this post is getting, Eric will need to start charging me for space on the forum :)Thanks for the continued interest and helpful advice…
Hamby’s Auto, I quite literally laughed out loud at the 5 gallons of gas reference. As a former insurance adjuster, the stories I could tell…Once a fellow adjuster adjusted a claim on a burned out vehicle on the side of the road.A pretty young lady even cried at the scene on his shoulder. Later he discovered the car was missing the front axles and transmission…haha..I digress…
When I got the heads back from the machine shop, I did install new valve seals on my bench. The bottoms of the valves (combustion chamber side) looked very clean. There was, however, some carbon on the stems…not excessive. I will keep you all up to date. As long as this post is getting, Eric will need to start charging me for space on the forum :)Thanks for the continued interest and helpful advice…
Congrats on the find and fix….I know you’re glad thus was relatively easy. Hope she runs better than ever…
Congrats on the find and fix….I know you’re glad thus was relatively easy. Hope she runs better than ever…
Wow JTF, wonder how in the world that rod became bent? I’ve never heard of that scenario.. I’d enjoy hearing the whole story. The vehicle is back with my professional mechanic buddy this week. I already owe him 3 steak dinners and counting… 🙂
In the event of a valve possibly sticking a bit, do you have confidence in any products to try such as Seafoam, Marvel Mystery Oil, etc, before tearing into an engine? I know these products are not guaranteed, but I’m wondering if that might be a possible cause.
Wow JTF, wonder how in the world that rod became bent? I’ve never heard of that scenario.. I’d enjoy hearing the whole story. The vehicle is back with my professional mechanic buddy this week. I already owe him 3 steak dinners and counting… 🙂
In the event of a valve possibly sticking a bit, do you have confidence in any products to try such as Seafoam, Marvel Mystery Oil, etc, before tearing into an engine? I know these products are not guaranteed, but I’m wondering if that might be a possible cause.
If you don’t fling anything based on wyestech and barnyb’s advise, I would go back with AC Delco OEM plugs that the vehicle calls for. I learned this the hard way on a GM. I put in some high dollar Bosch plugs and all kinds of crazy stuff happened. The engine ran horribly. After replacing the new Bosch plugs with the AC Delcos it ran like a sewing machine. This may not be the issue, but it’s where I would start. The same is true with a Honda or Toyota. They call for NKG or Nippondenso. Best of luck to you
If you don’t fling anything based on wyestech and barnyb’s advise, I would go back with AC Delco OEM plugs that the vehicle calls for. I learned this the hard way on a GM. I put in some high dollar Bosch plugs and all kinds of crazy stuff happened. The engine ran horribly. After replacing the new Bosch plugs with the AC Delcos it ran like a sewing machine. This may not be the issue, but it’s where I would start. The same is true with a Honda or Toyota. They call for NKG or Nippondenso. Best of luck to you
I’ll try not to make this too long…go grab that cup of coffee and come back 🙂 This past week I went back to some basics. I physically removed each spark plug, wire and coil and visually inspected them for cracks carbon tracking, etc., I then tested each cylinder at the end of the plug wire with my high energy adjustable spark plug tester. I had good, healthy, consistent spark with the tester gapped to 1 inch on each cylinder. Next I did a compression test. Each cylinder seemed to hold compression well. Here are the readings:
Cylinder Dry Wet
1 190 220
2 195 200
3 205 220
4 200 210
5 195 220
6 200 205I tried to test the MAF sensor, only to realize my ohm meter does not have the Hertz function at the last stage. Here is where things get even more frustrating. I decided to take the car to a reputable GM dealer in my home town. I went to the trouble of typing out the symptoms and all that I had done to the vehicle. The “Advisor” in the service area said this would help the technicians greatly. I asked that they trouble shoot and diagnose the issue.
When I returned to retrieve the car my Advisor friend told me the following (I wasn’t able to converse with the mechanic who analyzed the vehicle)…I was told there is a secondary ignition misfire in cylinder #2. The mechanic temporarily switched out the coil that controls that cylinder and even the ignition module with ones they had in the shop. The misfire was still present. He then proceeded to tell me that I needed to put the exact recommended spark plugs in the van. I had AC Delco platinum ones in it. He said it calls for the iridium rapid fire.
Well you know where this is going… Today, I replaced all the plugs. After my trip to the dealership and their advice I’m out 160 dollars with the same result.
So far for the skipping cylinder we’ve ruled out the plug, plug wire, coil, ICM and apparently the crank and cam sensors (these apparently checked out good at dealership).
So aside from a stick of dynamite, where would you experienced guys go from here? Should I do a leak down test. Is this a possible PCM issue? It could be an injector, but apparently this was checked too. Man, I wish I could have gotten to the mechanic for a personal conversation.
If you’ve gotten this far in my post, then God bless you and thank you…
Whipped and bum fuzzled….
I’ll try not to make this too long…go grab that cup of coffee and come back 🙂 This past week I went back to some basics. I physically removed each spark plug, wire and coil and visually inspected them for cracks carbon tracking, etc., I then tested each cylinder at the end of the plug wire with my high energy adjustable spark plug tester. I had good, healthy, consistent spark with the tester gapped to 1 inch on each cylinder. Next I did a compression test. Each cylinder seemed to hold compression well. Here are the readings:
Cylinder Dry Wet
1 190 220
2 195 200
3 205 220
4 200 210
5 195 220
6 200 205I tried to test the MAF sensor, only to realize my ohm meter does not have the Hertz function at the last stage. Here is where things get even more frustrating. I decided to take the car to a reputable GM dealer in my home town. I went to the trouble of typing out the symptoms and all that I had done to the vehicle. The “Advisor” in the service area said this would help the technicians greatly. I asked that they trouble shoot and diagnose the issue.
When I returned to retrieve the car my Advisor friend told me the following (I wasn’t able to converse with the mechanic who analyzed the vehicle)…I was told there is a secondary ignition misfire in cylinder #2. The mechanic temporarily switched out the coil that controls that cylinder and even the ignition module with ones they had in the shop. The misfire was still present. He then proceeded to tell me that I needed to put the exact recommended spark plugs in the van. I had AC Delco platinum ones in it. He said it calls for the iridium rapid fire.
Well you know where this is going… Today, I replaced all the plugs. After my trip to the dealership and their advice I’m out 160 dollars with the same result.
So far for the skipping cylinder we’ve ruled out the plug, plug wire, coil, ICM and apparently the crank and cam sensors (these apparently checked out good at dealership).
So aside from a stick of dynamite, where would you experienced guys go from here? Should I do a leak down test. Is this a possible PCM issue? It could be an injector, but apparently this was checked too. Man, I wish I could have gotten to the mechanic for a personal conversation.
If you’ve gotten this far in my post, then God bless you and thank you…
Whipped and bum fuzzled….
Thanks for the helpful info…I’ll have an appropriate update soon… I need a little help understanding primary versus secondary ignition in layman’s terms. I get a little lost with some of the in depth explanations on the web. Thanks in advance…
Thanks for the helpful info…I’ll have an appropriate update soon… I need a little help understanding primary versus secondary ignition in layman’s terms. I get a little lost with some of the in depth explanations on the web. Thanks in advance…
One additional thought…Check the radiator cooling fans just behind the radiator. Also, with the engine cold, you could check with the AC turned on (this will cause the fans to come on even though engine is cold). Then turn off the AC, and the fans should turn off ad well…This might help you check for the noise here.
One additional thought…Check the radiator cooling fans just behind the radiator. Also, with the engine cold, you could check with the AC turned on (this will cause the fans to come on even though engine is cold). Then turn off the AC, and the fans should turn off ad well…This might help you check for the noise here.