There has been a sharp upturn in vehicles failing the new smoke opacity test and an increase in cars where the DPF has been tampered with, JLM Products has reported.
A spokesperson at JLM Products said: “The lower smoke limits are the big problem, especially for higher mileage vehicles but so far we’ve had a 100 per cent success rate using JLM products.
“The JLM extreme air intake toolkit was launched in the same week as the new lower smoke limits were introduced to the MOT test.
“We’ve saved dozens of cars from the scrap yard.
“In one recent case a taxi came to our HQ having failed the new smoke test a few days earlier.
“It had been fully serviced with a new, genuine DPF filter but it failed the retest with almost the same results.
“Within a few hours we had the owner and his taxi back on the road earning a living after treating it with the JLM extreme intake toolkit.
“It went straight through the retest.
“We were lucky enough to be involved with the pre-launch testing and saw equally incredible results.
“Five vehicles with sticky turbo vanes were data logged before and after the treatment.
“On four of them boost levels came back into spec and out of limp mode.
“The other vehicle required a new turbo as it was past the point of no return.
“Sticking turbo vanes are a common problem on modern vehicles due to carbon build up so this new product is proving popular with our customers.”
DPF problems
When it comes to DPF problems, JLM Products warn that often a clean is not what’s required.
The spokesperson added: “Most DPF problems are the symptom of a different fault which is often overlooked.
“The DPF Doctor will carry out an assessment to identify the cause of the problem and then provide a quote to fix it and clean the DPF if required.
“For example we were asked to quote to clean the DPF on a Ford Transit and replace a faulty temperature sensor.
“Our assessment showed that the DPF was clean and the faulty temp sensor was actually a broken wire so no parts were needed to fix it.”
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