Question about 1992 Toyota Previa

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When running the spark plug wires, is there a tube or somthing of the sort for certain plug wires to go thru?

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It should have plastic tubing on them to stop them rubbing on each other any automotive retail will have the stuff

Posted on Jun 06, 2010

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Why does fuel appears on the spark plug?

No fire to that plug , could be coil wire or plug itself,,or Bad fuel injector, or computer that runs the fuel injectors,, or if is throttle body pinched wire under breather or bad control module,, and if its carbruated float stuck needs rebuilt,, check make sure your getting fire to the plug first,, pull the wire off and put a xtra plug in the wire,,, make sure its touching metal for ground, crank the car see if it sparks,,,if it does its more than likely it is somthing stated above

Sep 12, 2014 | Cars & Trucks

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1993 chevy c1500 wont start

Have you checked for spark at the plugs? Are you certain that the timing chain and tensioner were installed properly? Camshaft position sensor and crankshaft position sensor are OK? Without the right signal, nothing happens. Have you checked the coil packs, plug wires, and spark plugs? If there is no spark while cranking, you'll have to figure out why, and a shop manual is about the only way to go to do that. If you have spark, then you need to check for fuel at the injectors and the proper injector signal. Have you checked for fuel pressure at the rail? Does the fuel pump run? Is the fuel filter plugged?
It could also be a wiring problem somewhere in the electrical harness. If the right wire or wires are broken or corroded, then it could easily keep the engine from running. Even a loose or broken connector or a bent connector pin can cause all sorts of headaches.

Apr 21, 2014 | 1990 Chevrolet C1500

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My 1990 Honda Accord had a leak into the spark plug area, and also the tube between the pcv and recycled air intake was collapsed shut. I replaced the head gasket and tube. now i'm getting blow by (oil...

The pvc valve will always let some oil out into the intake to burn. That's normal. Now for the misfire at 2000 rpms, I believe you will have to clean out the EGR passages on your intake system. Basically, three of the four individual EGR passages are blocked up and when the EGR opens, it floods only one cylinder with exhaust gas, causing an extremely lean condition and misfire. It's not an easy task to do on that year Accord, but I think it's what's causing the misfire at high rpms, when the EGR valve opens.

Jan 02, 2011 | 1990 Honda Accord

2 Answers

Replaced sparkplugs and sparkplug wires, now runs rough. I checked connections all tight. check firing orger, looks right. run good till I touched it. Help.

Check the firing order with the firing order diagram that I have uploaded, and if that does not solve the problem then remove the spark plugs and be certain that there is an even spark plug gap between all of the spark plugs, (see the emission label under the hood for the correct spark plug gap) and be certain that there is not any split-fire or multi-fire spark plugs installed in the engine, because those plugs will not work with an OBD-II system, and a random mis-fire is the least that they will cause if installed in an OBD-II controlled vehicle.


Aug 18, 2010 | 2001 Ford Taurus

1 Answer


Starting on the pasenger side. Remove the intake tube running from the air filter box to the throttle body and disconnect enough tubes to swing it out of the way. The sparkplugs are down below the small coils you see at the end of the sparkplug wires. With a 10mm socket remove bolt holding the coil, disconnect the plug at the top of the coil by squeezing it at the top and pulling straight off the coils.

Pull the coil straight up. there will be about a 6 inch tube that connects to the top of the spark plug when inserted. You will need a 5/8 sparkplug socket and about 2 feet of extensions to make it easy on yourself. Insert the spark plug socket and extensions down the hole you removed the coils with the tube from and remove and replace the sparkplug. Reinstall your coil onto the engine and move to the next one until you have replaced all the plugs on the passenger side.

Make sure you reconnect all the plugs to the coils, hoses to the intake tube and reinstall your intake tube. The drivers side is a little easier. Pop the spark plug wires from their plastic holders to free enough slack to be able to pull your sparkplug wires out of the block. For the plug closest to the front of the engine you will need to remove the 10mm bolt holding the ground wires to the intake manifold to be able to free enough space for removing the plug.

For the middle plug you will need to remove the 10mm bolt holding the bracket that is holding one of the throttle cables at the top of the intake manifold. For the rear plug just pop the flexible hose that runs behind the black metal bracket straight up out of its clip and push it out of the way along with any other hoses that run through this area. Pull the spark plug wire from its place by pulling straight up just like with the coils. there will also be about a 6 inch tube running down to the spark plug at the bottom of these plugs.

Remove and replace the plugs same as before. make sure you reconnect all your hoses and wires to their previous locations. Doublecheck to make sure you reconnect all the ground wires/ brackets. Also you will need to use " twin ground electrode plugs" (see sticker on front of your plastic timing belt cover? to the right of the radiator hose).

May 27, 2010 | 2002 Toyota Tacoma

1 Answer

Acts like it's not getting gas

Poor accelleration, stalling, running rough at idle, low power are symptoms of poor spark. With engine running, remove and replace spark plug wires one by one. when you do this you may note that the engine becomes rougher or quits on certain plugs, and does not seem to change at all on one of them. the long plastic boot has a rubber insulator at the end of it. Spark has been known to jump from this seam over to the metal tube, effectively killing that cylinder, making it seem as though you have a fuel problem. If it is really a fuel delivery issue, the pump is accessed by removing the rear seat. under that is an panel that gives acess to the pump/level indicator assembly. The fuel filter is typically on the firewall, left side (follow the tubing going to your fuel rail , you'll find it.)

Oct 11, 2009 | 1993 Toyota Celica

1 Answer

Power loss at 3000rpm, model 740, 1991

You need to check alot of things to isolate the problem. Start with the air cleaner. Make sure it is not filled with dirt. I would check the spark plug wires. Crank the car. Take a spray bottle filled with water. Spray some water on the spark plug wires and the ignition core wire. It should make NO sparks. Turn the car off. If it made sparks or arcs, replace spark plugs wires and coil wire. Also, make sure that it takes effort to remove the spark plug wires. I have seen spark plugs wires that come off real easy. These should be replaced. You will need to remove one spark plug wire. Only ONE. (you don't want to crisscross the wires.) Remove the spark plug. Check the condition of it. Check the gap. If bad, replace. (I put anti sieze compound on the spark plug threads. Just a little bit.) Remember to fix one spark plug at a time. (You don't want to get the spark plug wires crisscrossed.) Move to the next spark plug. If the spark plugs look alright, I would check the distributor cap and rotor button. (It requires a little patience.) If all this looks good, I would do a compression test (if you have a compression test gauge). If not, check the fuel filter. Fuel should flow thru the filter. If this is good. I would put a vacuum pump on the fuel regulator. (If my a vacuum pump is not handy, I use a piece of tube and **** on it. However, safety conscious people would not think of doing this.) There are other things to do, but it starts requiring specialized tools.

Aug 25, 2009 | 1991 Volvo 740

1 Answer

How do I remove the spark plug wires?

The metal tube stays in the heads. They make a special pair of pliers to remove the spark plug boots from the spark plug. You should replace the wires at the same time as the plugs on those models anyway though.

May 28, 2009 | 2003 Hummer H2

1 Answer

Harsh change in old corolla auto .1990 model jerky from 1st to second

Sounds like the car has some sort of Ignition problem. Check the plugs,wires,etc. an sometimes oil can leak down the spark plug tubes an cause problems. Let me know how it works out!

Feb 23, 2009 | 2009 Toyota Camry Hybrid

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