Customer Replaced Spark Plugs And Now It Runs Bad?
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Date: 2020-08-05
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Comments and reviews: 10
Scooter
I remember working on a customers car many years ago after rebuilding the engine. When the assembler had installed the distributor he was a fair amount out of time and the vacuum advance hit on the intake manifold when you tried to time it. The customer wanted his car back as fast as possible so I decided to just leave it the way it was and move the plug wires over one notch so it could be properly timed. The customer got his car back and I thought that was the end of it. The next day the customer was back madder than hell because the car ran like a piece of crap. We pulled it in and it was very apparent the timing was way off. I popped the hood and started checking things out. I checked to see that the distributor was tightened down properly and it was but I noticed that the wires had been moved one notch. I put them back and to where they had been and the car ran like a clock and sent the customer on his way. The next day the car was back and running like garbage, I checked and once again the wires were changed one notch. I went out front and grabbed the customer and took him into the back shop. I asked him point blank why he was screwing with the plug wires. At first he denied touching them and then he finally admitted he had changes them himself. I asked why. He told me that the number one wire should go to the notch marked No 1 on the cap and he thought that he was fixing the problem. I pulled the distributor and moved the timing enough to fix the problem and retimed it. The problem in this case was the customer not knowing anything about timing.
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I remember working on a customers car many years ago after rebuilding the engine. When the assembler had installed the distributor he was a fair amount out of time and the vacuum advance hit on the intake manifold when you tried to time it. The customer wanted his car back as fast as possible so I decided to just leave it the way it was and move the plug wires over one notch so it could be properly timed. The customer got his car back and I thought that was the end of it. The next day the customer was back madder than hell because the car ran like a piece of crap. We pulled it in and it was very apparent the timing was way off. I popped the hood and started checking things out. I checked to see that the distributor was tightened down properly and it was but I noticed that the wires had been moved one notch. I put them back and to where they had been and the car ran like a clock and sent the customer on his way. The next day the car was back and running like garbage, I checked and once again the wires were changed one notch. I went out front and grabbed the customer and took him into the back shop. I asked him point blank why he was screwing with the plug wires. At first he denied touching them and then he finally admitted he had changes them himself. I asked why. He told me that the number one wire should go to the notch marked No 1 on the cap and he thought that he was fixing the problem. I pulled the distributor and moved the timing enough to fix the problem and retimed it. The problem in this case was the customer not knowing anything about timing.
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Bert
I changed a clutch for a friend, on a jeep.
I had a friend help me. What happened was it used a short throw out bearing and the original had a sleeve that went from the hydraulic slave cylinder to the throw out bearing.
I didn't realize it, but the new bearing was longer to replace the sleeve.
I put it back together and the clutch wouldn't engage. To make matters worst it was a 4X4 so I had to take it back apart and remove the sleeve. Fortunately, it only took about 3 and a half hours to fix it. I really felt bad because my friend had to wait an extra day to get his jeep back.
Since then on any clutch job I check the throw out bearing and compare them. What I found is, Ford did the same thing on some explorers. The thing is that sleeve looks like it's supposed to be in there, but the new bearing has a longer shaft.
reply
I changed a clutch for a friend, on a jeep.
I had a friend help me. What happened was it used a short throw out bearing and the original had a sleeve that went from the hydraulic slave cylinder to the throw out bearing.
I didn't realize it, but the new bearing was longer to replace the sleeve.
I put it back together and the clutch wouldn't engage. To make matters worst it was a 4X4 so I had to take it back apart and remove the sleeve. Fortunately, it only took about 3 and a half hours to fix it. I really felt bad because my friend had to wait an extra day to get his jeep back.
Since then on any clutch job I check the throw out bearing and compare them. What I found is, Ford did the same thing on some explorers. The thing is that sleeve looks like it's supposed to be in there, but the new bearing has a longer shaft.
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Christopher
Doing my first oil change on my Yamaha 400 motorcycle I think I was like 16. Didn't have a proper drain pan to drain the oil into. So I found an old large empty coffee can from the trash and used that. The can looked like it would hold 2 or 3 quarts and I thought it would be enough. Needless to say, the old oil came out, overflowed the can, gushed out over the sides, and spilled all over the garage. Huge mess. Never changed oil again without a good drain pan!
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Doing my first oil change on my Yamaha 400 motorcycle I think I was like 16. Didn't have a proper drain pan to drain the oil into. So I found an old large empty coffee can from the trash and used that. The can looked like it would hold 2 or 3 quarts and I thought it would be enough. Needless to say, the old oil came out, overflowed the can, gushed out over the sides, and spilled all over the garage. Huge mess. Never changed oil again without a good drain pan!
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Eric
Biggest mistake I made was stripping out a caliper bolt with an impact. I set the Ingersoll rand impact down on its back side and it hit the forward button for the direction valve. I didnt check direction before going after the second bolt and the rest is history. Lesson learned and I could just picture my old man telling me as a youngster to always check my direction. Sometimes it takes a little pain to get through a teenagers brain.
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Biggest mistake I made was stripping out a caliper bolt with an impact. I set the Ingersoll rand impact down on its back side and it hit the forward button for the direction valve. I didnt check direction before going after the second bolt and the rest is history. Lesson learned and I could just picture my old man telling me as a youngster to always check my direction. Sometimes it takes a little pain to get through a teenagers brain.
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jos
Here's mine. I changed front brake callipers; a job I've done before. I installed the right side on the left and visa versa. I bled the system several times but the brakes were always soft because of air in the system. Activated the ABS re-bled the system. Same issue until i noticed my mistake. (the bleed screws were not on top of the brake cylinder so there was no way to get all the air out) Not my proudest moment.
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Here's mine. I changed front brake callipers; a job I've done before. I installed the right side on the left and visa versa. I bled the system several times but the brakes were always soft because of air in the system. Activated the ABS re-bled the system. Same issue until i noticed my mistake. (the bleed screws were not on top of the brake cylinder so there was no way to get all the air out) Not my proudest moment.
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Dilan
Not a car mistake. But the second computer I built I had it on the bench and got the affirmative POST pass beep. So hooked it up at my desk. Still had the POST passed beep, but nothing on the display. I took the side off to see if I made any mistakes, top to bottom. Came up with nothing. Went to unhook it to bring it back to the workbench, and realized at that moment I didn't plug the monitor in.
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Not a car mistake. But the second computer I built I had it on the bench and got the affirmative POST pass beep. So hooked it up at my desk. Still had the POST passed beep, but nothing on the display. I took the side off to see if I made any mistakes, top to bottom. Came up with nothing. Went to unhook it to bring it back to the workbench, and realized at that moment I didn't plug the monitor in.
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John
I did it to an old xf falcon when replacing my distributor. Being a long six the HT leads were all different lengths. but I mixed them all up at the distributor cap. All it would do was cough and backfire until I looked at the firing order and big arrow on distributor cap. Loads of room for my sausage fingers around that engine hahaha: )
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I did it to an old xf falcon when replacing my distributor. Being a long six the HT leads were all different lengths. but I mixed them all up at the distributor cap. All it would do was cough and backfire until I looked at the firing order and big arrow on distributor cap. Loads of room for my sausage fingers around that engine hahaha: )
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Long
lmao. funny thing was, I knew that it was a mismatched connection before the diagnostic test was run. yep, I had done something similar back in the 1970's when I was working at my parents garage when I was 13. the lead mechanic took about 3 seconds before he changed the plug wires around and BAM, she purred like a kitten.
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lmao. funny thing was, I knew that it was a mismatched connection before the diagnostic test was run. yep, I had done something similar back in the 1970's when I was working at my parents garage when I was 13. the lead mechanic took about 3 seconds before he changed the plug wires around and BAM, she purred like a kitten.
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justindasilva73
Im still a newer tech so Ive had, y share of silly mistakes but one of techs I work with rebuilt his first transmission and had no gears he was flustered and walked away from it. Couple other techs came over. Turns out the transfer case was in neutral. So happy he didnt rip that transmission back out
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Im still a newer tech so Ive had, y share of silly mistakes but one of techs I work with rebuilt his first transmission and had no gears he was flustered and walked away from it. Couple other techs came over. Turns out the transfer case was in neutral. So happy he didnt rip that transmission back out
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Ken
3 types of mechanics
1. One that has feel in the fingers.
2. One that is a butcher! and think they know it all.
3. One that should never open the hood!
The owner of this vehicle is # 3. The only thing this owner should be allowed to do is keep his turn single fluid up to snuff.
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3 types of mechanics
1. One that has feel in the fingers.
2. One that is a butcher! and think they know it all.
3. One that should never open the hood!
The owner of this vehicle is # 3. The only thing this owner should be allowed to do is keep his turn single fluid up to snuff.
reply
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