Question about Chevrolet Cars & Trucks

1 Answer

Dishonest Mechanic? I went to a mechanic for a tune up on my Chevy Muscle car. It has a rebuilt 383 Stroker 8 cylinder. It was running a little rick, had some run on. This mechanic identified needing larger exhaust pipes so I did this with replacing the plugs, distributer cap, rotor, spark plugs. My Holly 4 barral Street Avenger Carb was rebuilt. he also repaired a small vacuum issue and the drivers sideheader gasket. A new power valve was put in(carb). I was told the car was finish, that it was running great and to come pick it up. I got there and when I went to start the car it was a little sluggish to warm up and the idle kept falling off..The mechanic looked puzzled then checked the timing again. When my flex fan kicked on it triggered the idle to drop. After a vacuum test it was diagnosed that the power valve was too small in the Carb...Had it changed out..still idled poorly. Was diagnosed with a bad MSD ignition Box...had it replaced, still had an idle problem...finally a leak down test was done and I was shown that I had 4 bad cylinders: Cylinder 3-40%, Cylinder2-30%, cylinder4 35%, Cylinder6-20%....I changed the oil every 3k miles(30k total on engine). The mechanic said that I needed to rebuild this engine, I was in shock. I only used Cheveron High test gas. I had no Idle problem before the tune up. The car ran well. I pulled the car from the mechanic saying I wanted a second opinion. I drove the car 7 miles home, it ran very well, started well, no smoke from the exhaust. The idle is high @ 1000rpm, was at 750RPM. There is no run on...What do you think...money is a little tight, did this mechanic try to sell me a needless engine overhaul? Should I bring it to another mechanic to look it over?

Posted by on

  • 1 more comment 
  • Edward Fazio Apr 29, 2013

    The engine was rebuilt, 4 years ago. The bugs were worked out 2 years ago. I never really drove the car hard. It has scary power. I push it only occassionally. Has never been on a track. The mechanic in question said that the car was running too lean for too long and this is what caused the excessive wear. This doesn't make sense either.

  • Edward Fazio Apr 29, 2013

    I was thinking of using the Risolene 8 cylinder restore additive. To free up the rings a little and help with loss of compression but I am concerned that it will do more harm than good.

  • Edward Fazio Nov 02, 2016

    After all this analytical going over...turns out the carburator was damaged during the rebuilding by the mechanic and I needed new spark plug wires. the mechanic swore it wasn t the carb, he lied. i put a new racing Holly carb and new wires and the car ran 85% better.

×

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 3,799 Answers

If you have a muscle car, it would be a good age. unless you have owned it from new, you don't know how it has been looked after before you got it. When you do a tune up it can highlight problems that you haven't noticed because the state of tune was hiding the problem. Also running expensive oil through an engine with an unknown history can create problems rather than prevent them. The stroker engine is a fairly high revving motor and as such is open to abuse. And the fact it is a muscle car will mean it will have been used as such. I would suggest you buy a second motor and recondition that while running the one in your car. As long as you can live with the motor you have got. You could take your time and do the work yourself. I don't think the mechanic was trying to rip you off. He just found problems that were already there, but hidden.

Posted on Apr 29, 2013

2 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

  • 14036 Answers

SOURCE: 2001 Galant ES-V6 DTC is P0304 - Cylinder #4 misfire

look for weak valve springs.

Posted on Jun 22, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

A mechanic falsifying indications to justify big engine work...How can I tell?


I suggest a second opinion would be in order as everything he did for the tune up was not altogether necessary. I consider that as the car was running ok before I would not touch the carby other than to fine tune the idle mixture to emission requirements. Any problems with the distributor cap would have showed up as a miss and the rotor button would have to be really bad but again as it was running ok. My policy is don't touch what ain't broke.Power valves in carbys are there to give extra fuel when the vacuum falls off under acceleration and do nothing else. To accommodate a bigger alternator more adjustment on the idle mixture screw would be necessary at idle but as alternator barely charge at idle the adjustment would be little. The low compressions may be from pumped up hydraulic followers and I would discuss that with the original engine builder as to what hydraulic units he fitted. but again if it was running ok before what the hell. Yes get a second opinion for sure from the engine builder.

Apr 29, 2013 | Cars & Trucks

2 Answers

My 2001 Chevy Silverado just got a newly rebuilt ******. The day i got the truck back the check engine light came on. I took back to mechanic and he ran the code. It said misfire and that truck was running...


did the code set for multiple/random misfire or did it set for a particular cylinder or cylinders?if it is random or multiple misfire you may want to check the fuel pressure and volume and for a vacuum leak. if it is a particular cylinder or cylinders then check your coils and also the compression to make sure the engine rebuild is good and something didn't go wrong.

Aug 12, 2011 | 2001 Chevrolet Silverado 1500

3 Answers

I started having a problem about a month ago. My 2003 Mercury Grand marquis LSE tuned up at 100k currently 145k. started hesitating and slight bucking at cruise speed. I went to autozone and coded #8...


A misfire can be related to a number of causes. Since the coil and spark plug were replaced and it did not solve this issue, it is most likely related to the circuit for the number 8 cylinder. A thorough inspection of the electrical circuit is what is required next. Also, engine compression will need to be tested on that cylinder as well as cylinder number 6 that is next to it. Vacuum leak around the intake port of the number 8 cylinder could also be a cause and will need to be checked.

Mar 31, 2011 | 2003 Mercury Grand Marquis

1 Answer

My 97 tahoe only running on 6 cylinders


If compression test is good is either no spark, bad coil or wire, or no fuel, bad fuel injector. Need to clarify which is not functioning properly.

Jun 23, 2010 | 1997 Chevrolet Tahoe

2 Answers

1979 chevy 350 modded to 383 stroker i have been


Sounds like the engine can't breath,
make sure pcv valve is good,or oil cap is vented.
your engine is building up pressure and has no where to vent,so it blows the easiest thing,the dip stick

Nov 18, 2009 | 1983 Chevrolet K1500

4 Answers

1998 honda accord rebuilt transmission


Hi I'm litoshop if your mechanic rebuild the tranny then it should run like new from the get go don't wait to long to take it back and have him correct the problem it sounds like your having sensor or solenoid problems if this is so then you can burned out the tranny again good luck if this information has been helpful please let us know thank you

Sep 15, 2009 | 1998 Honda Accord

1 Answer

Crank no start


JUST REMEMBER THE BASICS,COMP./SPARK/FUEL,IF ONES MISSING ,NO CRANK

Aug 20, 2009 | 1994 Chevrolet S-10 Blazer

1 Answer

No timeing marks on a chevy 383 stroker engine


you could bring it up on tdc on comp stroke and make your own mark on crank pulley and block then at least you know where tdc is and google some 383's that have close to same equip as you and see what degree they are running or just play with it and see how it runs .

Jun 04, 2009 | 1997 Chevrolet K1500

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

82 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts

yadayada
yadayada

Level 3 Expert

75822 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8210 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...