Question about 1990 Toyota 4Runner

1 Answer

Blocked CAT?? judder on low revs.....

I think i have a bloacked Catalytic convertor, i have a peugeot 406 rapier 2001 estate(1.8) and it accelerates fine but on low revs like when your just cruising at 2000rpm with no acceleration it feels a judder, as if the exhaust pressure aint comming out right, but as soon as i accelerate the engine seems fine.

I've had the same problem with a rover years ago and the guy in the garage said it needed a new cat +back box but he simply put a hole in the back box with a screw driver for a temp fix and the car was fine again! i then replaced both but i am wondering will drilling a small hole in the cat or back box temporarily fix my problem?

Can i do any damage by driving the car around with a cat like this?

I only paid £350 for the car and a new cat will cost me £180 fitted so i'm wondering if i can just put a hole in the back box or cat just to stop any damage for the time being until MOT, any tips?

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 677 Answers

You will not do any damage to the car driving with a stuffed cat.The exhaust has already left the engine and has left the building.No harm to be done.You said the engine goes fine when you stick the boot into it.Maybe not a blocked cat.Its probably engine tune but a hole in exhaust may get it and you going better:)Have a go mate!Hope this helps

Posted on Sep 04, 2009

Testimonial: "Thanks for the advice, very helpful A1+++++"


1 Suggested Answer

  • 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.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

Peugeot 406 hdi estate x reg when I sound the horn abs light comes on.

1: horn scars car, or abs, niece said. so....
2: horn is bad causing huge overload on he electrics.
3:low car battery, not charging fully. 12.6vdc rested, 13.3 to 15vdc running.
4: gawd forbid, bad ABS. (i dont believe it)
5: corroded fuses, wires and power feeds to abs , sure.

Jan 08, 2015 | Peugeot Cars & Trucks

1 Answer

Peugeot 207 problem

Does this judder cause your car to die or flood? Could be a couple things. fuel line may be partially clogged, or clutch is going out. It almsot sounds as if the gear you are in is to low however i assume you're not moving when this happens. Odd. Now that I think about it, it sounds like your engine is getting bogged down with excess fuel and causinig it to die, forcing you to rev to burn off the excess. Definatley chech plugs, wires, fuel injectors, line, and filter.
Good Luck!

Dec 05, 2013 | Cars & Trucks

1 Answer

Hello, I own a peugeot 306 2.0 litre turbo HDI

it sounds like the catalytic convertor is blocked

Apr 15, 2010 | 2006 Peugeot 604

1 Answer

My check engine light is blinking at me and the car accelerates very slowly from 0-30mph & between RPM 1-2 & makes a noise as if the car is coughing???

This is either a clogged catalytic convertor or a failed O2 sensor or both. A good muffler shop can fix this easily.
Dont replace the o2 sensor until you have verified that the catalytic convertor is good, or you may burn it out.
A quick way to diagnose a clogged cat is to check exhaust pressure and heat from your tailpipe. Restricted flow = Heat plus steam plus low pressure. Sometimes there is no steam.

Mar 10, 2010 | 2002 Hyundai Accent

2 Answers

Are there catalytic converters fitted on 406 2.0l

Its a dpf not a cat.Easy way to clean out[regenerate]First bring the engine to normal temp bring up the rpm to 4000 for 2 mins,then allow to idle for 30 seconds then bring the rpm up to 3000 rpm for 3 mins and yourfilter will have regenerated [fancy word for clean itself out. DPF = diesel particulate filter.Its important to use good quality low ash oil for your oil changes.

Mar 03, 2010 | 2005 Peugeot 405

3 Answers

What is the antipullution fault on peugeot 406?

If you drive your car more likely for short distances then the regenerating process couldn't be started to clean the cloged particulate filter and finally your car's ecu show you a antipollution fault. Drive your car to a motorway or dual carriage way.

The temperature meter should be showing above 70°C when you begin with this process. If this is the case, slow down place 3rd gear and drive at 3000-3500 rev /min to let the ecu to kick the regeneration process. Keep driving car 15 minutes in this state will be enough to solve this problem.

Sep 29, 2009 | 2005 Peugeot 405

2 Answers

Peugeot 406 estate 2l hdi, anti polution light on

it would never be 1000 euros!!!!!!!!!!!! it will be part of the exhaust system it cuts out because its causing pollution

Sep 15, 2009 | 2005 Peugeot 405

1 Answer

2003 Peugeot 406 diesel automatic stays in low gears

in automatic transmission box has two solenoids that were broken , so they must be changed , because I am peugeot specialist in Australia.

May 04, 2009 | 2005 Peugeot 405

1 Answer

Peugeot 307hdi rapier 2002, won't rev above 3000rpm

this happened to ours running on emptyish sucked some **** of the bottom of the tank took ours for a run thrashing it a bit worked out the problem otherwise i think u have to have the filter changed wich is the catalytic converter

Apr 28, 2009 | 2005 Peugeot 405

Not finding what you are looking for?
1990 Toyota 4Runner Logo

242 people viewed this question

Ask a Question

Usually answered in minutes!

Top Toyota Experts


Level 3 Expert

76649 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22219 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8522 Answers

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

Answer questions

Manuals & User Guides