Question about 1993 Chevrolet K1500

1 Answer

I have a 93 chevy pick-up. I rebuilt the engine and installed a 262xe flat tappet cam while I was at it. I started it up and I went to set the timing and it surges and idles rough. The fuel filter has been changed recently, the egr has also been replaced.

Posted by on

  • Richard Scordino May 11, 2010

    I don't know what the profile on that cam is but generally any cam with 220 degrees of duration or more can cause vacuum problems which can influence idle, computer controls etc.

  • Jerry Koski
    Jerry Koski May 11, 2010

    DID YOU GET VALVES ADJUSTED PROPERLY BEFORE STARTING IT ?? SOUNDS LIKE YOU MIGHT HAVE ONE TOO TIGHT OR ?

×

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    President:

    An expert whose answer got voted for 500 times.

  • Master
  • 957 Answers

Usually the I.A.C. valve is the culprit. Double check your timing marks. Make sure your injectors are spraying in a cone shape pattern. Look over the engine completely you may have forgotten to plug something in( vacuum line, electrical connector) Good luck.

Posted on May 03, 2009

Ad

1 Suggested Answer

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.
New users get to try the service completely Free afterwhich it costs $6 per call 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

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Foed 302 in 1980 /up l0w vacuum low comp. on no:4 newly rebuilt engine i am tolb i got a sticky valve


possible or the cam follower or hydraulic tappet is holding the valve open/ incorrect valve clearance setting initially
stick valves are normally from bent valve stems or damaged valve stems and guides

May 30, 2017 | Cars & Trucks

3 Answers

I need help with I am getting no oil pressure from my motor I just rebuilt first time rebuild it is a Chevy 350 out of a C20 pickup can anyone help


You have hooked up a manual test gauge to the oil pressure sensor/sender port and verified you have no pressure? Did you prime the oil pump before you starter the engine?

Jul 13, 2016 | Cars & Trucks

1 Answer

Hi have a f22b3 1995exi was wondering if any one nows the specs on the tappet gaps .Also can u adjust them and advance the motor ?? Wanna put it in a motor carna


the valve timing on a motor is set and cannot be altered. The length of time that the valves are held open is determined by the lift of the cam and this period of time that the valves are held open determines how much mixture is allowed into the cylinder. If you advance the cam shaft you may gain extra mixture and a bit more power but on a single cam the exhaust valve timing is altered and so the advantage of the advance is lost. If you want more go from the motor get specially ground cam shafts ( hot cams) As to tappet clearance, if you have hydraulic lifters then they self adjust and thee is no clearance measurement. If you can adjust the tappets then most engines run .010" hot inlet and .012" exhaust hot Setting the tappets closer means that they open sooner but they also close sooner so the amount of mixture is reduced as the time for the mixture to enter the cylinder is reduced.

Oct 30, 2014 | Cars & Trucks

1 Answer

Excessive noise from camshaft after head reconditioning and correct adjustment both standard setting and allowing for head being shaved - to no effect on a daihatsu charade 1991 G100


if its upper noise eg folowers and lifters if they are hydrolic lifters where these replaced are the cams ok if they are manually ajustable tappets these can be ajusted unless the following are goosed again the cams are pitted or mishapen will need new cam shaft the lifter rods are worn or week valve springs
but if they are hydrolic will have to be replaced inc cam shaft hope this makes sence ivan

Oct 01, 2012 | 1990 Daihatsu Charade

1 Answer

Will a broken timing chain on a 2000 Lincoln ls mess up the motor


Yes, normally what happen is it throw out the valve timing. That is, one or two piston could be effected here with its related intake and exhaust valves. What could happen, broken piston tops, bent valves or broken valves.


Since, the 2000 Lincoln has a 4.6 litre V8 engine it will double over head cams. This mean each side of the engine on this V8 has it own camshaft. Also, Ford could have installed a cam brake, that is if the timing is lost, it will stop all valves in both heads to a close position. I hope so, some 4 cylinder have this option.



If the engine doesn't have a camshaft brake then major overhaul. It would be easier to buy an rebuilt factory engine to install. A good engine remanufacture that rebuild engine for Ford, Chevy, Dodge, and other auto manufactures would be you best bet. In other words, they rebuild those engines the way Ford wants them to be rebuilt. Best of luck. GB...stewbison

Sep 18, 2011 | 2000 Lincoln LS

1 Answer

Need to know how to install headers on a 2003 impala. And how to set the rocker arms


Header install varies with brand and vehicle options. Best to get directions from the manufacturer. Some are easy, some need the motor lifted and accessory removal. On v8 Chevy engines there are two ways of adjusting lifters The "hot rod" method is to first adjust the push rods so you can turn them with your fingers before starting the engine. Move any that are on a lobe or ramp to the closed position when you do that.. Then with the engine running, loosen each 'till it gets noisy, then slowly turn it down till the noise stops. Non performance method is exactly the same but instead of stopping there, turn the adjustment 1/2 turn more after noise stops. Flat tappet or roller cams require using a feeler gauge and specifications of cam manufacturer. Rockers that are shaft or bridge mounted are not adjustable.

Jul 24, 2010 | 2003 Chevrolet Impala

1 Answer

1999 chevy suburban 5.7 L. vortec. Can a bad camshaft sensor cause a no start? rebuilt engine, fuel pressure 60 LBS.,spark at all the plugs, compression 140 lbs, timing is dead on.


i do believe it will not start with out it if you can hook up a scan tool to it crank the engine and look at rpms while cranking should read about two hundred forty rpms thats what fires the injectors the cam sensor tells the computer what cylinder is ready to fire next also scanner will set the cam timming.

May 27, 2010 | 1997 Chevrolet Blazer

2 Answers

Firing order on a 1990 f150 302


The rotor turns counterclockwise and the order depends on if you have an engine with a roller cam or a flat tappet cam. If it is a flat tappet cam, it is 1-5-4-2-6-3-7-8. If you have a roller cam, it is 1-3-7-2-6-5-4-8. You will either have an H.O. motor or not. H.O. is roller motor. You will also see the firing order etched into the intake manifold.

Mar 31, 2010 | 1990 Ford F150

2 Answers

New cam went flat in 30 min. 2nd cam wiped out also cams were crane hydraulic/ break in was followed.


Valve spring seat pressure too high, or valve lash too tight. In some cases a big-lift cam, with a stock set of springs causes coil-bind or "spring-stacking" and that will wipe a cam flat in about 5 minutes. Used lifters on a new cam won't seat properly, causing an uneven wear pattern. Doesnt take much to start a problem on a flat tappet cam, but hydraulics are usually more forgiving that solid lifters.

Oct 24, 2009 | 1985 Chevrolet Impala

1 Answer

I can't find a factory specs cam for my 1963 327/340 Chevy Corvette. I hope you can help. Thanks, David Wilkes or dewilkes@go.com.jo And, yes I do live overseas but will move back to Texas next summer.


If I remember correctly I believe that was a Duntov "0-97" flat tappet camshaft. There was also a slightly more aggressive grind hydraulic cam but I don't think either are available anymore. Best you can do and likely the most cost effective is to contact someone at crane cams or some other cam manufacturer and give them all the specifications on your vehicle and they can maker a suggestion on a specific replacement cam that will fit your needs. You can come out actually better this way because you can pick a cam that will work with your engine, gearing and anticipated use, putting the torque curve exactly where you want it..

Oct 11, 2009 | 1965 Chevrolet Corvette

Not finding what you are looking for?
1993 Chevrolet K1500 Logo

125 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts

yadayada
yadayada

Level 3 Expert

76630 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22219 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8514 Answers

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

Answer questions

Manuals & User Guides

Loading...