Setting the ignition contact point gap may eventually become a lost art, since the points are replaced in modern cars by electronic ignition. There are several common causes of engine vibration in a car, and they all result in shaking and noises that can be quite alarming and sometimes scary. However, if you know what some of the most frequent caused of engine vibration are, you can not only avoid too much stress and worry, you can know how to explain the problem and symptoms to a car mechanic when the time comes to correct the problem.
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  • The idle problem sounds like a dirty IAC. It's the canister shaped thing on the upper intake. You can take it off and clean it, and that may solve I found that on the electric vacuum regulator, the vacuum source and the EGR lines were reversed and that is what was causing my surges and rough idling.
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  • LTFT Idle Cells Enable VSS: LTFT idle cells will be used below this vehicle speed. LTFT Idle Cells Disable VSS: LTFT idle cells will be disabled above this vehicle speed. Fuel Trims LS1 V8 0 - 15 defined by the LTFT RPM and MAP boundaries 16 - Idle PN (AC on) 17 - Idle PN (AC off) 18 - Idle InGear (AC on) 19 - Idle InGear (AC off) 20 - Idle ...
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  • Comp Cams 12-601-4 Sbc Chevy Big Thumper Mutha Thumpr Cam Camshaft Rough Idle (Fits: Chevrolet Corvette) ... Cam Camshaft Rough Idle. $170.23 ... 1992-1996 Corvette ...
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  • Sep 02, 2020 · The redesigned Gen. II LT1 Chevrolet small-block (L98) introduced in the 1992 Corvette was an updated version of the time-proven small-block first introduced in 1955 with its share of interesting refinements—some quite controversial. The cam-driven water pump with reverse-flow cooling and OptiSpark ignition system were revolutionary.
Jul 03, 2008 · 1.) raised the idle set screw level (worked but putting into gear at high idle is probably hard on the tranny, didn't really address my problem) 2.) rebuild the carb and cleaned out the idle mixture circuits (was also trying to fix a hesitation out of the gates) helped, but... Starting with the engine at idle, slowly increase engine speed to 3,000 RPM, engine vacuum should be equal to or higher than idle vacuum at 3,000 RPM. If vacuum decreases at higher engine RPM's, an excessive exhaust back pressure is probably present.
My 1992 Corvette was hard to start when hot and cold. It was the fuel pressure regulator. Easy to replace. This worked for me and you may find a different wa... This will change the car’s air to fuel ratio, and can cause rough idling (car feels rough and bouncy when the engine is running), as well as difficulty starting. If experienced in tandem, there is a high likelihood of a failing canister valve, or some other part of the EVAP system.
1992 Chevrolet Corvette. ... Holley 850 double pumper, solid cam with a rough idle, super comp ceramic headers, 3000 rpm stall, summit th350. Classics ... Dec 20, 2005 · I am the original owner of a 1990 GMC Sierra K1500 5.7 with 115,700 miles. I am also the only person to work on this truck so I know everything that has ever been done to this truck. I have been trying to solve a rough/hunting idle that only happens when the engine is fully warmed up. I have had ...
it's rough at idle, but seems like a loss of some power, a little shaky on acceleration.truck ran good all morning, parked it for an hour, and i noticed the difference as soon as i started it and put into drive, ... NO check engine light coming on, I have a obdII scan tool, but don't think it will work with the diesel.A failing control valve solenoid can cause stalling and poor or very rough idle on the 1984 Corvette Crossfire engine. The 1984 engine uses a manifold vacuum source to operate the EGR valve so a strong vacuum flow from a stuck open control valve solenoid would allow EGR to flow at idle.
Oct 09, 2005 · Idle is going to poo. This is a discussion on Idle is going to poo within the General Help forums, part of the LSx Technical Help Section category; The car: 1992 Corvette LT1 The problem: Just within the last month or so my engine has developed a tick ... All new vehicles come with an on-board diagnostics port which hooks up to the vehicle's computer. Whenever the vehicle detects that something may be wrong--whether it's an emissions-related problem, cooling system issue, engine problem or something as simple as a loose gas cap, in some cases--the Check Engine light will appear.
Feb 20, 2015 · 2 things on this rough idle. 1. Many posts have reported that they have found a spark plug wire off or loose at the spark plug. This was mainly 2014. 2. Depending on how rough the idle is G.M. stated in a article that they intentionally made the engine idle a little rough on purpose because that is what the typical Corvette wanted.
  • Neck jowl tightening1985-1992 Throttle Body Injection Wiring Harness Installation. Quality of Construction This harness is constructed using OEM quality wire for superior reliability and long term use. The wire colors are the same as the factory wire colors for car and truck TBI injected engines.
  • Nbme 11 block 4The rough idle issue could be plugs, wires, cap, rotor, coil, poor routing of the plug wires causing cross-fire, dirty injectors, weak or dead cylinder, low fuel pressure. Idle is running too high. Keep tweaking the timing but not the right fix. Seems like I still have a vacuum problem, so I'm interested to see if your fix worked.
  • Backpack blower rack amazon1. 1975 Corvette Base In 1974 it was still possible to get a Corvette with a big block, 270-hp, "LS4" 454-cubic-inch V8. And even the base 350-cubic-inch (5.7-liter) small-block V8 was still gross ...
  • Why are consumer research and design thinking so critical to intuitpercent27s successThe idle problem sounds like a dirty IAC. It's the canister shaped thing on the upper intake. You can take it off and clean it, and that may solve I found that on the electric vacuum regulator, the vacuum source and the EGR lines were reversed and that is what was causing my surges and rough idling.
  • Nh4f cation and anionI seem to have a rough idle, inconsist RPM's and seems to run rough went crusiing. ... but somehow it's more comforting to cry in a CORVETTE than in a Kia" Reply ...
  • Umx u693cl twrpJan 21, 2016 · A catch can is a simple solution to the problem, but there’s more to it than just throwing a cylinder and some tubes onto your engine. Here’s what you really need to know about catch cans and how to stop blow-by from ruining your engine.
  • Nolin lake homes for saleMy 1996 Chevrolet Cavalier (2.2L) engine (30,000 miles) has a mildly rough idle (like little surges), that comes and goes from hour to hour of operation. My dealer changed the fuel filter and then told me that my problem was a leaking valve cover gasket that had allowed oil to foul the plugs, ruin the plug wiring, and ruin the serpentine belt.
  • Kuta software infinite algebra 2 quadratic equations with square roots answersA rough idle condition is usually caused by an overly lean fuel mixture that results in lean misfire. A common cause of idle problems is air leaks between the carburetor and intake manifold (tighten the carburetor base bolts or replace the gasket under the carburetor), air leaks in vacuum lines or the PCV system or EGR valve.
  • Costco hand soapLTFT Idle Cells Enable VSS: LTFT idle cells will be used below this vehicle speed. LTFT Idle Cells Disable VSS: LTFT idle cells will be disabled above this vehicle speed. Fuel Trims LS1 V8 0 - 15 defined by the LTFT RPM and MAP boundaries 16 - Idle PN (AC on) 17 - Idle PN (AC off) 18 - Idle InGear (AC on) 19 - Idle InGear (AC off) 20 - Idle ...
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Jun 21, 2015 · Here’s the throttle body relearn procedure. 1) Start the engine and let it idle in park for 3 minutes. During that period the idle may be higher idle than normal. 2) After 3 minutes, turn the engine off and leave it off for 60- seconds. 3) Start the engine again and let it idle in park for 3 minutes one more time.

1992 Chevrolet Corvette 5.7L No Start, Poor Idle Quality, Misfire Posted to GM Driveability on 8/1/2017 44 Replies hi every one I need help fast, customer needs this car by Friday. came in with customer complaint of running rough at idle and almost stalls, I cleaned a very dirty throttle body, compression test changed the plugs. every once in ... The idle is better than when I bought it, but it is still rough once it warms up and lowers to around 600. Anything off idle is smooth and even the cold idle is fine, but once the rpms come down it gets a lil rough. There is no dummy lights and Im trying to think of something else that could cause this.