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 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


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    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

  • 2 Answers

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

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.
Good luck!

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%


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



Related Questions:

1 Answer

The carb on my 350 chevey engaine is one i never seen it got wires running to the jets it started to pop and catch fire what can i do

Rick may have placed his question in the wrong category but I'll give it a shot... First, Rick, I'm going to have to presume the 'carb' is actually a throttle body and the wires are going to the injector spray nozzles on the top of the 'carb' throttle body.
If your engine is backfiring through the throttle body it can mean one of three things,
!.) First if it runs, or even won't run, double check the spark plug wires to make sure #1 wire goes to the #1 cylinder and the rest are to the correct cylinders too. Just two wires crossed will backfire through the intake with flames. For referencing which is where, The #1 cylinder on 350 small block Chevy is the forward most cylinder on the drivers side of the engine. The cylinder behind #1 is the #3 cylinder the #5 and #7 on the drivers side. The #2 cylinder is the forward most cylinder on the passenger side with #4 behind it then #6 and #8 in the rear. The firing order for all Chevy V-8's is as follows; 1-8-4-3-6-5-7-2. Looking at the engine from the front of the car the #1 cylinder tower on the distributor cap is usually at the 5 o'clock position or pretty close to it. The distributor rotates in a clockwise direction.
2.) The second condition could easily be the distributor timing is off. If you haven't turned the distributor any then that isn't the problem. If it runs double check the ignition timing for accuracy.It should read between 8 - 12 degrees advanced.
3.) Lastly, and this may be difficult to swallow if it's true but here goes. You could have either a sticking intake valve or a flat cam lobe on one of your cylinders. To check this pull the wire off the distributor cap and put it back on one by one to see if the engine runs differently with it off. If no change if found that is your failing cylinder to investigate. By that I mean to check the compression reading on that cylinder.
Changing Distributor Cap and Rotor Chevrolet Truck GMC 350 305 How to 1988 95 GM Truck Ignition Systems

Dec 06, 2016 | Chevrolet Cars & Trucks

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

1 Answer

1996 Chevy K1500 4L60E trans problem

O.k. the small hose that you have coming out of the case is the trans vent. The one going up the firewall is for the transfer case. The trans vent should be hooked to the transfercase vent. You say you have a 383? Are you running the fuel injection system. Is this a 4L60E (the stock transmission). If you have fluid coming from the vent, the transmission is getting too hot. Replace the cooler. Do away with the radiator cooler and add one to the front in front of the condenser.

Jul 22, 2010 | 1996 Chevrolet K1500

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

1 Answer

Crank no start


Aug 20, 2009 | 1994 Chevrolet S-10 Blazer

1 Answer

383 Stoker Chevy dies when I put it in gear

That converter should make stalling less of an issue, not more. (stall speed is higher than stock) Make sure that you have the cam degreed in properly, that you have the timing set properly (I'd use 8-12 degrees to begin) and make sure that you have no vacuum leaks.
With a stock converter, you shouldn't use any cam with more than 220 degrees duration...With the higher stall converter, you may get a few more degrees leeway. Also, the carb is too small for the application...should have at least a 750 dbl pumper or larger on there depending largely upon the car weight, gearing and what you have as far as intake and exhaust. (header diameter, length and design)...This should have been all figured out on paper before spending a dime for parts...Biggest mistake I see is people putting "mis-matched" parts together and expecting it to work (everything needs to compliment everything else)

Jul 03, 2009 | 1996 Chevrolet Cavalier

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


Level 3 Expert

78257 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22326 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6927 Answers

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

Answer questions

Manuals & User Guides